Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 17
Fiu. 6. it should be placed on edge so that the graduation marksmay touch the surface on which the measurement ismade. Thus: … On account of the wearing off of the graduationmarks at the ends of the scale, it is well to begin at adivision at a distance from the end (Fig. 7). Although metric rules are usually graduated only tomillimetres, practice will enable one to estimate to thetenth of a millimetre by an imaginary…
Physics
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