Lecture

 1 Int|          of the magnetization of light, and of diamagnetism. Round
 2 I  |          up; and I could perhaps light phosphorus or a lucifer-match
 3 I  |         bodies, whether heavy or light, fall to the earth by this
 4 I  |        two balls of lead, a very light one and a very heavy one,
 5 II |          disc, B, C, D, and this light acts as a sun by which I
 6 II |         B F, a certain amount of light falls on it; and if I hold
 7 II |       nearer the lamp at E, more light shines upon it. And you
 8 II |  one-fourth of the proportion of light which is obstructed. That,
 9 II |         if you consider how much light shines on you at one distance,
10 II |        going to use the electric light again. You see we can not
11 II |         in which we use a ray of light for the purpose of seeing
12 II |          the interior of bodies. Light is a thing which is, so
13 II |        not). All matters affects light more or less by what we
14 II | possesses of attracting a ray of light. If Mr. Anderson pours some
15 II |         will attract the rays of light downward, and the piece
16 II |      which I have put there. The light which now goes to you from
17 II |    understand how glass attracts light, and might then see how
18 II |         stones, would affect the light; and, if Dr. Tyndall will
19 II |         enough to let us use his light again, we will first of
20 II |         beam of parallel rays of light which it emitted was bent
21 II |      here you see, if I send the light through this piece of plain
22 II |         the screen]. This ray of light is bent out of its course
23 II |         glass not only bends the light by virtue of its attraction,
24 II |        thus attract and bend the light with varying powers. We
25 II |      powers. We will now let the light pass through one or two
26 II |           you see, is our ray of light: we have first to make it
27 II |        have our polarized ray of light, and I can so adjust it
28 II |       which it is shining either light or dark, although I have
29 II |        the course of this ray of light but what is perfectly transparent [
30 II |      that it does not enable the light to get through. You see
31 II |   internally, has no effect upon light. [The glass was removed
32 II |         see how that enables the light to pass through to the screen,
33 II |   calcareous spar acts upon this light - that stone which split
34 II |           See how that turns the light round and round, and produces
35 II |    before had no action upon the light. You shall see what it will
36 II |        have our ray of polarized light, and I will first of all
37 II |          it in the course of the light, the screen still remains
38 II |          and hence it allows the light to pass through. How beautiful
39 II |        that is! how it makes the light come through some parts
40 II |       glass [introducing it]. No light passes through; the screen
41 II |         placed across the ray of light.] Now you see how beautifully
42 II |          see how beautifully the light goes through those parts
43 II |         are hot, making dark and light lines just as the crystal
44 II |    condition; for these dark and light parts are a proof of the
45 III|   through the tube to blow out a light; the light is blown out.
46 III|         to blow out a light; the light is blown out. And look!
47 III|         the purpose of obtaining light, and which we carried about
48 III|             that is the electric light we used yesterday, and by
49 III|      take this small vessel to a light, the vapor inside explodes
50 III|          take this wax taper and light it, and turn it upside down
51 IV |         in this manner and put a light to it, I think you will
52 IV |         fire - not with a bright light; you will, at all events,
53 IV |          oxygen; it is extremely light; for, although yesterday
54 IV |         I know that it is a very light body, and that it will continue
55 IV |         shall see, on applying a light, that the hydrogen has left
56 IV |          shows you very well how light a substance this is; for,
57 IV |         waiting until we want to light it. But it is not so in
58 IV |           a piece of iron - if I light it and put it into the oxygen,
59 IV |      which gives that fine green light; and I have here some more
60 IV |  affinity is to produce Heat and light; you know, as a matter of
61 IV |        chemical affinity to give light and heat, they go away immediately
62 IV |         seems to evolve heat and light continuously, but it is
63 IV |       and this work of producing light and heat by chemical affinity
64 V  |      ball, this bubble of air [a light India-rubber ball, inflated
65 V  |        for that only attracted a light ball, but here I have several
66 V  |         jet, but the gas did not light.] Ah! the gas did not light,
67 V  |      light.] Ah! the gas did not light, but you saw the spark;
68 V  |       one side, or else it would light; we will try this experiment
69 VI |          showing you the kind of light produced by the actual combustion
70 VI |        it burnt with a brilliant light.] That shows you what the
71 VI |         here this great electric light. That very same power which
72 VI |      cells, and that this is the light of that burning [bringing
73 VI |         and showing the electric light]; and we might so arrange
74 VI |          burn, and therefore the light you see is really the burning
75 VI |      have that glorious electric light; and the moment I cut off
76 VI |      water, and get our electric light there. There they are in
77 VI |     connection, we have the same light as we had in that glass
78 VI |       besides this production of light, we have all the other effects
79 VI |        chemical action, heat and light from a magnet, but what