Wright, Mark R., 1854- · London : Longmans · leaf 12
raw. If the rod moves tothe right or left, the needle will roll, and the pointer will move tothe right or left. A very slight movement of the bar will cause aconsiderable movement of the index. Heat the bar with a spirit-lamp, the temperature rises, and the pointer informs us that the baris… … Fig. 2. A more difficult experiment is the following:—A piece ofplatinum wire 18 long (fig. 2) is attached to an iron or copper B2 Heat screw ; it passes over a piece of knitting-needle to which an indexis attached as in the last experiment; the wire then passes througha notch in the smooth iron…
Physics
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