A laboratory manual in physics, to accompany Black and Davis' "Practical physics for secondary schools," (1913)
Black, Newton Henry, 1874- [from old catalog] · New York, The Macmillan company · leaf 74
wire of zinc.Arrange the coils of the galvanoscope so that the coils arenorth and south, and turn the compass so that its zero isdirectly under the north end of the needle. When all theconnections are made, immerse the plates in the acid andread the deflection of the needle as soon as it stops… … E3 0 Nut _=^ =£~HI s ~fz 3= ^^ -:^ d^fl fe Fig. 32 This is known as to allow the needle to take its proper position. Watch theneedle carefully for two minutes and record what you ob-serve. Short-circuit the cell for half aminute by holding a stout, short copperwire in contact with both the copper…
Physics
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