Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 75
ith theirfaces parallel. Then the distance between the blocks is thediameter of the sphere. Measure from edge to edge di- .-1.1 ill lilil « h Ii1.li 11 -I ■ I ■ hi ill li .1.1,1.1. B AC D / rectly over the centre of the sphere. The ball should beturned and the work repeated a few times. Both… … When the scale cannot be brought up to the body, specialmethods are resorted to. One is called The CompassMethod. A pair of compasses or dividers are adjusteduntil the distance betweentheir points is just that tobe measured. The compassesare then applied to the scale,with one point on a num-bered…
Physics
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