A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 44
pplied by use of the spherometer inthe following manner: Place the instrument onthe plane glass plate and obtain the readings of thescales ; these may be denoted the zero readings.Place the spherometer on the spherical surface(Fig. 19); adjust it and again note the scalereadings. The difference… … Fig. 19.—Spherometer oua spherical surface. d BD! h■■ R-2X + 2 To obtain BD, place the spherometer on a pieceof tinfoil and press gently so as to mark thepositions of the three legs D, E, F (Fig. 19).Measure DE, EF and FD, and take the mean; let this dimension be a mmThe angle EDG is 30° and BD is…
Physics
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