Part

1 I  |       where gigantic masses of iron are cut and shaped like
2 II |      fire; machine wheels with iron axles going at a great rate
3 II |      against steel, or when an iron bar is worked for some time
4 III|         in which mercury in an iron vessel was substituted for
5 III|      thermo-electric elements.~Iron which is brought near a
6 III|       attracts other pieces of iron, or a suitably placed steel
7 III|     part is a horseshoe shaped iron core, which stands in the
8 III| reversing the magnetism in the iron core of the spirals b b,
9 III|       that machine there is an iron core which, by being approached