Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 20
LENGTH. 9 this dimension of the earth, the meter is to be regarded inreality as an arbitrary rather than a natural length. The relation of the centimeter to the inch is given veryexactly by the equation 1 in. — 2.5400 cm. 8. Instruments for the Measurement of Length.—Scales.The determination of a… … Fig, 4. placed alongside the given length, the whole number ofunits may be read off and the fraction of a unit estimated toone tenth of a millimeter under favorable conditions. Whengreater accuracy is desired, various special instruments areused, differing somewhat with the manner in which…
Physics
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