A text-book of physics, largely experimentalOn the Harvard college "Descriptive list of elementary physical experiments." . raised or lowered at will,serves to exert upon it the varyingpressures required to keep the vol-ume of the air unchanged when itstemperature is raised or temperature of the air at anytime is calculated from its bulb may have a capacity ofone or two hundred cubic centi-meters and the whole instrument istoo cumbrous for common can be used, however, for testingand correcting mercury-thermome-ters intended for accurate below the t
A text-book of physics, largely experimentalOn the Harvard college "Descriptive list of elementary physical experiments." . raised or lowered at will,serves to exert upon it the varyingpressures required to keep the vol-ume of the air unchanged when itstemperature is raised or temperature of the air at anytime is calculated from its bulb may have a capacity ofone or two hundred cubic centi-meters and the whole instrument istoo cumbrous for common can be used, however, for testingand correcting mercury-thermome-ters intended for accurate below the temperature at whichmercury freezes and far above thetemperature at which it boils, the gas-thermometer can be used; and when we read of —150°C. or +1000° C., we may be sure that such temperatures, ifdetermined accurately, have been determined by means ofa gas-thermometer or some instrument, usually some elec-trical device, tested and approved by it. 275. The Absolute Thermometer Scale.—If we havetwo temperatures, t° C. and t.° C., in mind we may, in ac-cordance with § 272, write, for a gas at constant volume,. FIG. 189. 3 3 b PHYSICS.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectphysics
