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   Lecture                              grey = Comment text

 1 I    |       water. 4 It is now very hot; it is steaming up; and
 2 II   |   this powdered alum and some hot water, and mix them together,
 3 II   |   here poured a little of the hot solution of alum into the
 4 II(7)|       to add powdered alum to hot water as long as it dissolves;
 5 II   | through those parts which are hot, making dark and light lines
 6 III  |       this: I will take a red hot ball of iron [Mr. Anderson,
 7 III  |       grains of iodine into a hot glass globe, which immediately
 8 IV   |     charcoal thrown off white hot into the oxygen, and burning
 9 IV   |     burn until it is made red hot is because it has got a
10 IV   | together until they make them hot enough to take fire; and
11 IV   |     wood, you will make it so hot as to scorch wood and paper,
12 V    |      near the fire it becomes hot. I can show you this by
13 V    |  piece of gun-cotton with the hot wire, and you see how I
14 V    |     bar of copper and keep it hot. Now you are aware that
15 V    |    that the metal will become hot before the wood; for if