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 46
their relative directions and magnitudes in order to pro-duce equilibrium ? Three spring balances.Three clamps.30 cm. ruler. Fishline.Block of wood. To the middle of a piece of fishline about 40 cm. long tiea second piece about half as long. At each of the free endsmake a loop and attach the hook… … Fig. 17 32 LABORATORY MANUAL the scale where it is most reliable, and then slip a page of thenotebook under the cord connecting the balances, so thatthe knot conies about in the middle of the page. In order to show the direction of each cord on the paper,place a rectangular block alongside and draw…
Physics
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