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| Hermann Ludwig Ferdinand von Helmholtz On the Conservation of Force IntraText - Concordances (Hapax - words occurring once) |
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1 III | air . . . . . . . . . 426.0 metres~ " oxygen . . .. . . . .
2 III | improvements in his methods.~1. A series of experiments
3 III | telegraph, for instance. [Fig. 103] represents a Morse's telegraph
4 Int | near Berlin, on August 31, 1821. His father was a man of
5 I | Delivered At Carlsruhe: Winter 1862-1863~As I have undertaken
6 I | At Carlsruhe: Winter 1862-1863~As I have undertaken to
7 Int | years, till his death in 1894, he continued to produce
8 III | equivalent was 424.9 metres.~2. Two similar experiments,
9 Int | near Berlin, on August 31, 1821. His father was a
10 III | value of the equivalent was 424.9 metres.~2. Two similar
11 III | nitrogen . .. . . . . 431.3 "~ " hydrogen . . . . . .
12 III | mercury, gave 426.7 and 425.6 metres.~Exactly the same
13 III | as is necessary to raise 80.9 pounds of water from the
14 II | parts of the machine.[Fig. 97 represents a front view
15 II | high-pressure engine, and Fig. 98 a section. The boiler in
16 Int | early showed mathematical ability, and wished to devote his
17 | about
18 I | first explain. It is not absolutely new; for individual domains
19 I | utilised; but she does it abundantly with water, which, being
20 Int | He held a succession of academic positions, teaching physiology
21 I | reach our eye; and, just on account of this simple conformity
22 III | and Maxwell, very well accounts for all the phenomena of
23 III | the piston of the machine, accumulated in it, and combined in a
24 II | supplied from external sources. Accurate experiments have shown that
25 II | century; and a rich and accurately-worked chapter of physics had been
26 III | I have stated how we are accustomed to measure mechanical work,
27 III | glass vessels filled with acidulated water a and a1, which are
28 Int | medicine, physiology, optics, acoustics, mathematics, mechanics,
29 III | for work.~We here become acquainted with a new source of work,
30 I | with great velocity, it acquires a new force, which can overcome
31 I | very complicated apparatus, acting in an extremely intricate
32 II | each of you could easily add to from your own daily experience,
33 III | are his numbers, I will adduce the results of a few series
34 III | strike against each other and adhere firmly, inasmuch as they
35 I | seizes or is seized by the adjacent pinion. Take, for instance,
36 II | cannot, without further ado, be restored to their original
37 I | but the universal standard adopted in manufactures for measuring
38 I | not indeed be practically advantageous in those cases in whimh
39 II | this velocity could have affected.~If we review the results
40 III | forms of work, or results afresh from them.~We turn now to
41 I | arrangements. We produce by their agency an infinite variety of movements,
42 III | the ground, it produces an agitation, which is partly transmitted
43 III | in friction, as close an agreement is seen as can at all be
44 II | equilibrium be restored by allowing some of the liquid to flow
45 | alone
46 II | though with an essential alteration introduced by Clausius,
47 III | store of force which is not altered by any changed of phenomena,
48 III | changes. All change in nature amounts to this, that force can
49 III | direction. A gas would thus be analogous to a swarm of gnats, consisting,
50 I | a further characteristic analogy between the effects of the
51 III | we turn the handle, the anker R R1, on which is coiled
52 II | friction, but never completely annul it. A wheel which turns
53 II | diminished, and ultimately annulled by the resistance of the
54 | anything
55 III | separated, their atoms torn apart, if new effects are to be
56 III | phenomena of gases.~What appeared to the earlier physicists
57 III | work in combustion, which appears in the form of heat. In
58 I | foot pounds is universally applicable. The use of such a weight
59 I | foot can produce.1~We may apply this measure of work to
60 I | of discovering laws and applying them with thought. For the
61 II | reach their goal at the appointed time. The advantages which
62 Int | esthetics, and he had a lively appreciation of painting, poetry, and
63 III | iron core which, by being approached to the poles of the large
64 II | not well chosen; it is too apt to suggest to us the force
65 I | there is no more suitable arena than inquiry into Nature
66 I | namely, the muscles of the arms. An arm the muscles of which
67 Int | surgeon in the Prussian army. He began the publication
68 I | taken by itself, can indeed arouse our curiosity or our astonishment,
69 II | measurement, the apparatus may be arranged more simply. At C is a glass
70 II | gravity and returns to M, arrives there with a certain velocity,
71 III | moment an electrical current, arriving by the telegraph wire, traverses
72 I | I might almost say, of artistic satisfaction, when we are
73 III | you see bubbles of gas ascend from the plates i and i1.
74 I | the quay. Now, it may be asked, If a large, heavy weight
75 III | internal motion can only be asserted with any degree of probability
76 I | wanting.~The law in question asserts, that the quantity of force
77 I | constructor and cannot be assigned to the instrument at work.~
78 II | formed water must have here assimilated could not have been conducted
79 II | But even here it might be assumed that the various chemical
80 II | which heat performs, by assuming that the hypothetical caloric
81 I | arouse our curiosity or our astonishment, or be useful to us in its
82 I | that afforded by modern astronomy. The one simple law of gravitation
83 III | it possible, then to tear asunder the particles of carbonic
84 Int | ever-enduring interest that attaches to an exposition by one
85 III | electrical current. But we can attain the same object by mechanical
86 I | must beg you to pay special attention to the following points:
87 III | regard this force as an attractive force between the two, which,
88 III | becomes magnetic, and then attracts other pieces of iron, or
89 Int | Potsdam, near Berlin, on August 31, 1821. His father was
90 | away
91 I | Suppose the pinion on the axis of the barrel of the winch
92 I | place it in the position a1 b1, in which the heavy weight
93 II | axle of a carriage which is badly greased and where the friction
94 III | makes a mark on a paper band, drawn by a clock-work,
95 II | against steel, or when an iron bar is worked for some time
96 III | by a series of projecting barriers, in which parts were cut
97 II | to revolve rapidly on a base of soft wood.~So long as
98 III | starting from considerations based on the immediate practical
99 II | by Clausius, is among the bases of the modern mechanical
100 II | assumption, which was the basis of the theory of heat, that
101 Int | a master, who brings to bear upon it all his wealth of
102 I | certainty and in their entire bearing, there is no more suitable
103 | became
104 | because
105 | becoming
106 III | fermented liquids - from beer and champagne. Now this
107 I | clockwork in motion. Now I must beg you to pay special attention
108 II | capable; with them has really begun the great development of
109 II | to us the force of living beings. Also in this case you will
110 | below
111 I | enunciated by Newton and Daniel Bernoulli; and Rumford and Humphry
112 Int | kind. "The matter," says a biographer, "is discussed by a master,
113 I | But both the arm of the blacksmith who delivers his powerful
114 II | the suspended weight by a blow.~From this we learn further
115 III | from the freezing to the boiling point; and just as the same
116 Int | physiology at Konigsberg, Bonn, and Heidelberg, and for
117 Int | Ferdinand von Helmholtz was born at Potsdam, near Berlin,
118 I | when it has reached the bottom, it has lost none of its
119 II | processes which have here been briefly mentioned, were the subject
120 Int | the rich harvest of his brilliant and laborious research.~
121 Int | discussed by a master, who brings to bear upon it all his
122 Int | son the foundations of a broad general education. His mother
123 III | eddies thus produced being broken by a series of projecting
124 I | rapidly-flowing regularly-filled brooks and streams. We find water
125 I | by the aid of which heavy burdens may be lifted by a comparatively
126 III | compounds; thus, when we burn limestone, it separates
127 III | mouth of the other tube, it bursts into flame, just as happens
128 I | are cut and shaped like butter, to spinning and weaving
129 III | extremely perfect methods. Calculations with the best data of this
130 II | assuming that the hypothetical caloric endeavoured to expand like
131 II | gradually expends this acquired capability in driving the clock-work.~
132 I | we get to know the hidden capacities and desires of the mind,
133 II | of the windmill, a more careful investigation of the moving
134 II | disappears, and if we do not carefully consider the matter, it
135 I | To A Series Delivered At Carlsruhe: Winter 1862-1863~As I have
136 II | A French engineer, Sadi Carnot, son of the celebrated War
137 II | recognised; the axle of a carriage which is badly greased and
138 III | is, as it were, only the carrier which transfers the chemical
139 I | against their float-boards and carries them along. Such wheels
140 I | feebler, and ultimately ceases entirely, being gradually
141 III | water in the decomposing cell, and uses it for overcoming
142 III | place simultaneously in the cells of the voltaic battery.
143 III | water through one degree centigrade. The quantity of work necessary
144 II | horizontal line drawn through the centre of the sphere; P the point
145 Int | of his life filling the chair of physics at Berlin.~The
146 III | liquids - from beer and champagne. Now this attraction between
147 II | rich and accurately-worked chapter of physics had been developed,
148 II | development of industry which has characterised our century before all others.
149 I | and so forth. It is the cheapest of all motive powers, it
150 I | the largest and heaviest chests from a ship to the quay.
151 III | endeavour to get it out of the chimneys of our houses as fast as
152 I | mechanism has the richest choice of means of transferring
153 II | attached to a thread in a circle, we can even change a downward
154 II | under the most favourable circumstances, to as great a height as
155 I | every picture of manners, of civic arrangements, of the culture
156 III | cylindrical porous vessel of white clay, which contains dilute sulphuric
157 I | this comparison, to form a clear and precise idea of the
158 II | power is most simply and clearly seen in a simple pendulum,
159 III | mechanical work in friction, as close an agreement is seen as
160 II | other when the stopcock R is closed. If the liquid is in equilibrium
161 III | the two substances are in closest proximity to each other.
162 II | regulates the opening and closing of the valve. But we need
163 III | and magnetism were made to co-operate, could not be done without
164 II | working of the clock. To coil up the spring we consume
165 III | horseshoe magnet, and in these coils electrical currents are
166 II | indeed pass from hotter to colder bodies; but the quantity
167 II | air. And instead of the column of liquid which was raised
168 I | swings for a while before coming to a rest, but its motion
169 II | Sir Humphry Davy in the commencement of the present century.
170 II | and the limbs of which communicate with each other when the
171 II | entire work which the arm had communicated in the operation of stretching;
172 II | neighbourhood of suitable lines of communication present a favourable opportunity
173 III | hollow cylinder of very compact carbon. In the middle of
174 I | products exhibit, and in the comparative ease with which laws can
175 I | burdens may be lifted by a comparatively small expenditure of force.
176 II | they could at that time be compared with experiments, have held
177 III | hydrogen . . . . . . 425.3 "~Comparing these numbers with those
178 I | variety of motions; it can compel the most varied instruments
179 III | this galvanic apparatus is completed, and the decomposition of
180 I | phenomena with such accuracy and completeness that we can predict their
181 I | muscles, which are a very complicated apparatus, acting in an
182 II | when they change their composition, are sometimes liberated
183 III | work is necessary for their compression; or, conversely, how much
184 II | off. Thus the cross-bow concentrates into an extremely short
185 I | contact and comparison in our conceptions and feelings; we get to
186 IV | Part IV - Concluding Remarks~What I have to-day
187 II | heat, and the practical conclusions from which, so far as they
188 III | order to show how closely concordant are his numbers, I will
189 II | The advantages which the concourse of numerous and variously
190 III | newly formed in combustion, condenses upon it.~If a platinum wire
191 II | assimilated could not have been conducted to it by the cold ice, or
192 III | decomposition of water.~If now the conducting circuit of this galvanic
193 II | thermometer is unchangeable.~By conduction and radiation, it can indeed
194 III | chemical forces.~In all conductors through which electrical
195 IV | something beyond the narrow confines of our laboratories and
196 I | of machines, we find it confirmed that in proportion as the
197 III | of gold making, and had confused many a pondering brain.
198 III | experiments, in which a conical ring rubbed against another,
199 II | rod acts by means of the connecting rod P, on the crank Q of
200 III | is capable of work. The connections between the various natural
201 I | tired is only one of the consequences of the law with which we
202 II | provided we may leave out of consideration the influence of the resistance
203 III | analogous to a swarm of gnats, consisting, however, of particles infinitely
204 II | gunpowder, that is to say, whose constituents have changed into other
205 I | the connection which it constitutes between natural phenomena
206 I | is due to the mind of the constructor and cannot be assigned to
207 III | heat is produced by the consumption of work, a definite quantity
208 II | elements and chemical compounds contain certain constant quantities
209 I | are weighted by the water contained in them, the latter not;
210 II | differed from solid ice in containing a certain quantity of heat
211 II | though, in order to keep up a continual disengagement of compressed
212 Int | till his death in 1894, he continued to produce in an unbroken
213 III | conditions that could be controlled as perfectly as possible,
214 III | latter are, in practice, more convenient for producing large quantities
215 II | it is only expended more conveniently~The case is somewhat different
216 I | demonstrated. In Nature the converse is the case. It has been
217 I(1) | technical measure of work; to convert it into scientific measure
218 II | the mass of the powder is converted into gases at a very high
219 II | flow out at R, as the globe cools it will be drawn up towards
220 III | R R1, on which is coiled copper-wire, rotates in front of the
221 I | drives mills which grind corn, sawmills, hammers, and
222 I | These differences, which correspond to the different degree
223 III | pressure equal to their own counterpressure, was partly known from the
224 Int | contributions to science cover medicine, physiology, optics,
225 I | Take, for instance, the crabwinch. Suppose the pinion on the
226 I | systems of pulleys, levers and cranes, by the aid of which heavy
227 II | connecting rod P, on the crank Q of the flywheel X and
228 II | friction, and must have been created by friction.~Heat can also
229 III | Their particles probably cross one another in rectilinear
230 II | it is shot off. Thus the cross-bow concentrates into an extremely
231 II | clock-work.~If I stretch a crossbow and afterwards let it go,
232 II | and supply the necessary crude force; thus the more intelligent
233 I | itself, can indeed arouse our curiosity or our astonishment, or
234 III | the carbon cylinder is a cylindrical porous vessel of white clay,
235 II | easily add to from your own daily experience, we shall see
236 I | reservoirs are necessary for damming the rivers to produce any
237 I | enunciated by Newton and Daniel Bernoulli; and Rumford and
238 III | Calculations with the best data of this kind give us the
239 Int | fifty-two years, till his death in 1894, he continued to
240 I | of our own mind.~The last decades of scientific development
241 III | At the same time, it also decides a great practical question
242 III | last two centuries, to the decision of which an infinity of
243 III | currents, and should be able to decompose a large number of other
244 III | natural forces. We have decomposed water into its elements
245 III | the electric current which decomposes water. This current is itself
246 II | had indeed endeavoured to deduce the work which heat performs,
247 II | from this assumption he deduced in fact a remarkable law
248 I | who chains us. Every great deed of which history tells us,
249 II | process is always accurately defined, and that the further capacity
250 I | movements, with the most various degrees of force and rapidity, from
251 I | violinist who produces the most delicate variations in sound, and
252 I | As I have undertaken to deliver here a series of lectures,
253 I | Introductory Lecture To A Series Delivered At Carlsruhe: Winter 1862-
254 I | arm of the blacksmith who delivers his powerful blows with
255 I | unawakened.~It is not to be denied that, in the natural sciences,
256 I | that I wish by any means to deny, that the mental life of
257 II | possible.2 This does not depend on the direction of the
258 IV | produced the immense coal deposits in the depths of the earth.
259 IV | immense coal deposits in the depths of the earth. The forces
260 Int | education. His mother was a descendant from William Penn, the English
261 II | is that many physicists designate that view of Nature corresponding
262 I | the hidden capacities and desires of the mind, which in the
263 III | numbers with those which determine the equivalence of heat
264 III | made with the object of determining this point show, an equivalent
265 II | of these machines we can develop motive power to almost an
266 II | ingeniously they have been devised. We are only interested
267 Int | mathematical ability, and wished to devote his life to the study of
268 I | the study of which I have devoted myself. The natural sciences,
269 II | this view, liquid water differed from solid ice in containing
270 I | series of important and difficult experiments on the relation
271 Int | and he did much to give it dignity and to set a standard. His
272 III | white clay, which contains dilute sulphuric acid; in this
273 II | We can, indeed, very much diminish their friction, but never
274 III | rectilinear paths in all directions, until striking another
275 IV | which are at our disposal, directs us to something beyond the
276 III | working force may indeed disappear in one form, but then it
277 II | gaseous states, in which heat disappeared - at any rate, as regards
278 I | It has been possible to discover the law of the origin and
279 III | different methods may be discovered for each of these problems.~
280 I | faculty innate in us of discovering laws and applying them with
281 I | power.~Before passing to the discussion of other motive forces I
282 II | order to keep up a continual disengagement of compressed gases from
283 IV | forces which are at our disposal, directs us to something
284 III | saline kind of substance, dissolves in the liquid. The oxygen,
285 I | Humphry Davy have recognised distinct features of its presence
286 II | the pendulum shows us very distinctly how the forms of working
287 I | rope, at a, is uniformly distributed in the block over four ropes,
288 I | instruments to execute the most diverse tasks.~Just so it is with
289 I | they are used for the most diversified arrangements. We produce
290 II(2)| measure of the work we must divide it by the intensity of gravity;
291 I | absolutely new; for individual domains of natural phenomena it
292 I | own labour or of that of domestic animals. According to Strabo,
293 II | circle, we can even change a downward motion into an upward one.~
294 I | mouth begins to incline downwards, it flows out. The buckets
295 I | application was first stated by Dr. Julius Robert Mayer, a
296 II | cord is fastened. If now I draw the weight M on one side
297 I | only one side of the wheel, draws this down, and thereby turns
298 I | differences in the power and duration of the moving force required.
299 | during
300 I | which I can discharge that duty will be to bring before
301 II | and the two tubes d and e allow the steam to pass
302 III | gases.~What appeared to the earlier physicists to be the constant
303 Int | English Quaker.~Helmholtz early showed mathematical ability,
304 I | machine, would it not be very easy, by means of a crane or
305 III | paddles was rotated, the eddies thus produced being broken
306 I | political power, that every educated man who tries to understand
307 Int | foundations of a broad general education. His mother was a descendant
308 III | exhaust themselves in the effort.~Electrical currents can
309 III | new source of work, the electric current which decomposes
310 III | directly shown for another element, hydrogen, which can be
311 III | invisible motion of the smallest elementary particles of bodies. If,
312 I | course, in this comparison eliminate anything in which activity
313 III | experience extends, rules and embraces all natural processes; which
314 III | of the other. The gases emerge through the tubes g and
315 I | in the time of the first Emperors. Even now we find water
316 I | turned to the observer, and empty on the other side. Thus
317 II | how this vapour, in its endeavor to expand, is compelled
318 I | effect; but when fired and endowed with great velocity it drives
319 II | accurately investigated. A French engineer, Sadi Carnot, son of the
320 I | such increase of riches, of enjoyment of life, of the preservation
321 I | origin and progress of many enormously extended series of natural
322 Int | gymnasium, whose influence ensured to his son the foundations
323 I | natural phenomena it was enunciated by Newton and Daniel Bernoulli;
324 III | the temperature has become equalised, this is exactly as much
325 III | those which determine the equivalence of heat and mechanical work
326 I | and social sciences to establish. But in mental life, the
327 III | thereby produced, and has established a definite relation between
328 Int | together in his work on esthetics, and he had a lively appreciation
329 III | the whole universe remains eternal and unchanged throughout
330 II | continue to move to all eternity. The motions of the planets
331 Int | research, while there is the ever-enduring interest that attaches to
332 | everything
333 II | which everything agreed excellently with the hypothesis - that
334 II | they are formed, by the exercise of the most powerful pressure.
335 III | the force of affinity is exerted between the elements as
336 I | the velocity of the water, exerting an impact against the float-boards,
337 III | can perform work, but they exhaust themselves in the effort.~
338 I | phenomena and natural products exhibit, and in the comparative
339 I | characteristic differences which exist between the natural and
340 I | stated, that this difference exists. Not that I wish by any
341 II | time the steam has free exit from the other half of the
342 II | Regnault used for measuring the expansive force of heated gases. If
343 III | The same result we must expect from chemical action. When
344 III | is seen as can at all be expected from numbers which have
345 II | perform work; it gradually expends this acquired capability
346 II | the subject of extensive experimental and mathematical investigations,
347 II | processes could at that time be explained in no other manner than
348 III | in roundabout ways, the explanation of which would lead us too
349 Int | interest that attaches to an exposition by one who is giving forth
350 III | objects of human utility, but expresses a perfectly general and
351 I | expenditure of force.~This very expression which we use so fluently, '
352 II | importance in the endeavour to extend the law of the Conservation
353 III | all previous experience extends, rules and embraces all
354 II | to almost an indefinite extent at any place on the earth'
355 IV | surrounding vegetation, or the extinct life which has produced
356 III | only acts through them with extraordinary power, if the smallest particles
357 I | needs years to reach our eye; and, just on account of
358 III | when you have before your eyes a series of its applications
359 I | front of the wheel, and at F, where the mouth begins
360 II | have seemed an incredible fable to our forefathers, who
361 I | which for the moment they facilitate the exertion, also prolong
362 I | law. Reason we call that faculty innate in us of discovering
363 I | point of its path, it cannot farther put it in motion.~But we
364 I | moreover, the intellectual fascination which chains the physicist
365 Int | on August 31, 1821. His father was a man of high culture,
366 I | motion becomes each moment feebler, and ultimately ceases entirely,
367 III | burns when ignited with a feebly luminous blue flame. In
368 II | the dry hands together to feel the heat produced by friction,
369 I | the human arm.~From the feeling of exertion and fatigue
370 I | comparison in our conceptions and feelings; we get to know the hidden
371 III | further, that when a weight fell without performing any work,
372 Int | Introductory Note~Hermann Ludwig Ferdinand von Helmholtz was born at
373 III | from all fermenting and fermented liquids - from beer and
374 III | that which ascends from all fermenting and fermented liquids -
375 Int | science in 1842, and for fifty-two years, till his death in
376 Int | twenty-three years of his life filling the chair of physics at
377 III | exhausted space where it finds no resistance, it does not
378 I | the least pressure of the finger is sufficient, without any
379 II | instance, I discharge a firearm loaded with gunpowder, the
380 I | no great effect; but when fired and endowed with great velocity
381 II | in which moves a tightly fitting piston C. The parts between
382 I | twenty-four hours. If we fix ten such clocks, each with
383 III | volume.~If I hold a glass flask filled with water over the
384 II | produce fire by striking flint against steel, or when an
385 I | undershot wheels dips in the flowing water which strikes against
386 I | expression which we use so fluently, 'expenditure of force,'
387 II | P, on the crank Q of the flywheel X and sets this in motion.
388 III | facts have been tested.~It follows thence that the total quantity
389 II | incredible fable to our forefathers, who looked upon the mailcoach
390 Int | his own treasury." It is fortunate for the layman when a scientist
391 Int | influence ensured to his son the foundations of a broad general education.
392 I | years and centuries to a fraction of a minute.~On this exact
393 II(2)| of the first second of a freely falling body.~
394 III | pounds of water from the freezing to the boiling point; and
395 III | quantities of heat by a fresh combination with oxygen;
396 II | quantity, which is an essential fundamental property of all matter.
397 I | which turns the wheel, and furnishes the motive power. But you
398 III | emerge through the tubes g and g1. If we wait until
399 III | through the tubes g and g1. If we wait until the upper
400 III | conversely, when heat is lost, we gain an equivalent quantity of
401 III | problem promised enormous gains. Such a machine would have
402 III | heat.~We may express this generally. It is a universal character
403 II | boiler in which steam is generated is not represented]; the
404 I | and rolling mills, where gigantic masses of iron are cut and
405 Int | exposition by one who is giving forth from his own treasury."
406 III | blue flame. If I bring a glimmering spill near the mouth of
407 III | analogous to a swarm of gnats, consisting, however, of
408 II | vessels far away, reach their goal at the appointed time. The
409 II | transports travellers and goods over the land in numbers
410 I | astronomy. The one simple law of gravitation regulates the motions of
411 I | machines. It drives mills which grind corn, sawmills, hammers,
412 Int | culture, a teacher in the gymnasium, whose influence ensured
413 I | the work of a weight, and hang to the block a load of 400,
414 II | no longer remains quietly hanging at M as it did before, but
415 III | bursts into flame, just as happens with oxygen gas, in which
416 I | in the hand is the most harmless thing in the world; by its
417 Int | the outside world the rich harvest of his brilliant and laborious
418 II | state of tension without having to exert my arm. This is
419 I | tremendous force.~If I lay the head of a hammer gently on a
420 I | of the preservation of health, of means of industrial
421 II | is far greater than the heating which takes place when the
422 I | regulates the motions of the heavenly bodies not only of our own
423 I | transfer the largest and heaviest chests from a ship to the
424 Int | at Konigsberg, Bonn, and Heidelberg, and for the last twenty-three
425 I | masses of stones to great heights, which they would be quite
426 I | physician (now living in Heilbronn), in the year 1842, while
427 I | prolong it, so that by their help no motive power is ultimately
428 Int | Introductory Note~Hermann Ludwig Ferdinand von Helmholtz
429 | herself
430 I | feelings; we get to know the hidden capacities and desires of
431 II | the working parts of the high-pressure engine, and Fig. 98 a section.
432 II | of which, a, is somewhat higher than the point A in the
433 IV | only flow down from the hills when rain and snow bring
434 I | philosophical, philological, historical, moral, and social sciences
435 I | Every great deed of which history tells us, every mighty passion
436 II | the forms of working power hitherto considered - that of a raised
437 I | seen one or two workmen hoist heavy masses of stones to
438 III | of the whole volume.~If I hold a glass flask filled with
439 III | latter is now limited to holding the atoms of carbon and
440 III | subsequently see that the same law holds good also for processes
441 I | used in the great plains of Holland and North Germany to supply
442 III | acid, in which there is a hollow cylinder of very compact
443 I | partly unfamiliar, and partly hostile, which is the reward of
444 II | it can indeed pass from hotter to colder bodies; but the
445 III | out of the chimneys of our houses as fast as we can.~Is it
446 I | to raise a load of four hundredweight by means of a rope passing
447 II | performs, by assuming that the hypothetical caloric endeavoured to expand
448 II | that the phosphoric mass ignites, teaches this fact. Nay,
449 II | Part II - Velocity And Motive Force~
450 III | Part III - Experiments Of Joule~The
451 I | and we can therefore best illustrate from human labour the most
452 I | regularly-ordered whole - a kosmos, an image of the logical thought of
453 III | combustion - carbonic acid. Immediately after combustion it is incandescent.
454 IV | life which has produced the immense coal deposits in the depths
455 II | caused by the very minute impacts on its little roughnesses.~
456 II | produced by the impact of imperfectly elastic bodies as well as
457 I | we know how to tame the impetuous force of steam, and to make
458 II | substance, very fine and imponderable indeed, but indestructible,
459 III | after introducing the latest improvements in his methods.~1. A series
460 I | the force for the small impulses and sounds which the pendulum
461 Int | professorships, however, give a very inadequate idea of his range. His contributions
462 III | other and adhere firmly, inasmuch as they form a new compound -
463 III | Immediately after combustion it is incandescent. When it has afterwards
464 I | muscles of which are lamed is incapable of doing any work; the moving
465 Int | order has the skill and the inclination to share with the outside
466 I | where the mouth begins to incline downwards, it flows out.
467 I | wider sense, the mathematics included. And it is not only the
468 I | profoundly, and with such increasing rapidity, transformed all
469 II | which must have seemed an incredible fable to our forefathers,
470 II | imponderable indeed, but indestructible, and unchangeable in quantity,
471 II | thermometer, and therefore was not indicated by it. Aqueous vapour contains
472 I | expenditure of force,' which indicates that the force applied has
473 I | that the mental life of individuals and peoples is also in conformity
474 I | preservation of health, of means of industrial and of social intercourse,
475 I | flows spontaneously from the inexhaustible stores of Nature; but it
476 I | produce by their agency an infinite variety of movements, with
477 III | been filled with it, we can inflame hydrogen at one side; it
478 I | But in mental life, the influences are so interwoven, that
479 III | above experiment, the almost infusible platinum might even be melted.
480 II | mechanical arrangements, however ingeniously they have been devised.
481 I | Reason we call that faculty innate in us of discovering laws
482 I | more suitable arena than inquiry into Nature in the wider
483 II | its six passengers in the inside, and its ten miles an hour,
484 III | chemical forces, through the instrumentality of the electrical current.
485 I | can compel the most varied instruments to execute the most diverse
486 II | crude force; thus the more intelligent human force may be spared
487 III | non-luminous flame, you see how intensely it is ignited; in a plentiful
488 III | work; so that in all these interchanges between various inorganic
489 I | industrial and of social intercourse, and even such increase
490 II | been devised. We are only interested in the manner in which heat
491 III | before. But this process is interesting, for the mechanical force
492 III | in a brass vessel. In the interior of this vessel a vertical
493 II | place all at once or by intermediate stages. This also agreed
494 I | life, the influences are so interwoven, that any definite sequence
495 I | acting in an extremely intricate manner.~Let us now consider
496 I | instead of human labour, we introduce the work of a weight, and
497 III | which he obtained after introducing the latest improvements
498 I | Part I - Introduction - The Conservation Of Force~
499 II | On the other hand, the invariability in the quantity of heat
500 II | had not been accurately investigated. A French engineer, Sadi
501 II | windmill, a more careful investigation of the moving masses of