Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 22
ordered by the customer. Now theyard-stick is intended to be an accurate copy of the standardyard kept at the capital of the country, and this latter weknow is an accurate copy of the original preserved in London,England. In order to ensure the accuracy of the merchantsyard-stick a government… … MEASUREMENT OF MASS 11 two marks on a pliotographic plate. We choose the mostsuitable instrument for the purpose in view. For the wire orthe sphere a screw gauge would be very convenient. One ofthese is illustrated in Fig. 7. A isthe end of a screw which works ina nut inside of D. The screw canbe…
Physics
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