great that the expressiony _ . * 2 may be considered constant, so we can letv 7j+ Y2_ Substituting these values, we have c1e = c(Y1- Y2)c% , . cxor, letting — — m Yx- Yz= m e% INSTRUMENTS. 99 m is the constant of the instrument and may be deter-mined by using a known difference of potential forT71—… … Fig. 47. the peripheral edges of the corresponding members of theupper and lower set being united, forming a sort of cylin-drical box around the vane. Readings are taken by a beamof light reflected along a scale by a vertical mirror attachedto the vane. The whole is mounted in a glass vessel…
Electronics · Electricity
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