Lecture

 1 I  |        call water - it is there ice [pointing to a block of
 2 I  |          pointing to a block of ice upon the table], there water - [
 3 I  |        Do not suppose that that ice and that water are two entirely
 4 I  |     same manner as I can change ice into water and water into
 5 I  | mountains, the rocks, snow, and ice, together falling toward
 6 III|     though it be in the form of ice or steam). Why is this water
 7 III|          pointing to a block of ice]; because the attraction
 8 III|        happens when we make the ice warm? Why, in that case
 9 III|      the centre of the block of ice]. You see I am now melting
10 III|        see I am now melting the ice where the iron touches it.
11 III|         I can not melt all this ice by the heat contained in
12 III|    between the particles of the ice, for below a certain temperature
13 III|    mutual attraction and become ice; and above a certain temperature
14 III|   northern regions is all solid ice and icebergs, while here,
15 III|        between the particles of ice, we made use of another
16 III|         liquid state. If I melt ice in other ways I can not
17 III|        have the means of making ice liquid without heat - that
18 III|       Now if I put some of this ice into the metal dish, and
19 III|        little salt added to the ice has the power of causing
20 III|         the liquid state to the ice on becoming liquid. I remember
21 III|       the point was how to melt ice in a quart pot by the fire
22 III|     this: they put some pounded ice in a pewter pot, and added
23 III|     salt was mixed with it, the ice in the pot melted (they
24 III|        between the particles of ice. Here you see the tin dish
25 III|        solid, e. g., water into ice, a corresponding amount
26 III|      happened with our piece of ice here), that we did at last
27 III|     this new form: when we make ice into water, we lessen its
28 III|       into water and water into ice: in either case it would
29 III|     illustration, whether it be ice, or water, or steam, it
30 IV |      seen its power of changing ice into water and water into