Lecture

 1 I  |        what we call a weight [an iron half cwt.] - a thing called
 2 I  |         downward pressure of the iron, and of the power which
 3 I  |         balance - which made the iron weight press upon and flatten
 4 I  |        as steadily as a piece of iron would do; and I might even
 5 II |    gradual, suppose I take a few iron particles [dropping some
 6 II |          some small fragments of iron on the table]. There! I
 7 II |           Here I have an arch of iron filings regularly built
 8 II |       regularly built up like an iron bridge, because I have put
 9 II |      together. Now just as these iron particles hold together
10 II |       the different particles of iron which constitute this nail
11 II |        one. And here is a bar of iron; why, it is only because
12 II |          different parts of this iron are so wrought as to keep
13 II |         the flint and the bar of iron is true of the piece of
14 II |      most wonderful? That bar of iron one inch square has such
15 II |         are of strength - we use iron, stone, and other things
16 III|          will take this piece of iron [a rod of iron about two
17 III|          piece of iron [a rod of iron about two feet long and
18 III|       handed to the lecturer the iron rod, with one end red-hot,
19 III|       the smith takes a piece of iron and heats it in order to
20 III|      will take a red hot ball of iron [Mr. Anderson, by means
21 III|       lecturer a red-hot ball of iron, about two inches in diameter],
22 III|        heat [placing the red-hot iron in the centre of the block
23 III|        melting the ice where the iron touches it. You see the
24 III|          touches it. You see the iron sinking into it; and while
25 III| concerned with the attraction of iron for iron, water for water,
26 III|       the attraction of iron for iron, water for water, wood for
27 III|        show you the way in which iron burns, because it will serve
28 III|     sieve, the fine particles of iron filings through it, and
29 III|     shook through the flame some iron filings, which took fire
30 IV |       And here, also, a piece of iron - if I light it and put
31 IV |   combination. There you see the iron burning very well in oxygen,
32 IV |     clearing itself off from the iron, and allowing more and more
33 IV |          and the reason why this iron does not burn until it is
34 V  |          them together in masses iron attracted to iron, brass
35 V  |         masses iron attracted to iron, brass to brass, or water
36 V  |   magnets or loadstones; ores of iron, of which there is a great
37 V  |    attract a very large piece of iron. That, then, is a very different
38 V  |         I have several ounces of iron held up. And if we come
39 V  |        what action this piece of iron has on it. Well, it attracts
40 V  |       now, instead of a piece of iron, I take a magnet, and examine
41 V  |      mass will lift that lump of iron, and, what is more, by placing
42 V  |          can not make a piece of iron or any thing else heavier
43 VI |     first time. I have here some iron filings and gunpowder, and
44 VI |        will drop this mixture of iron filings and gunpowder through
45 VI |      plentiful combustion of the iron filings; but I want you
46 VI |   lighted match. So ready is the iron to burn, that it takes,
47 VI |        burns! Here is a piece of iron on the charcoal: see what
48 VI |        There is that long bar of iron held out, and I have no
49 VI |           but all those lumps of iron hanging on to the end. What,