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Practical Pyrometry: The Theory, Calibration and Use of Instruments for the Measurement of High Temperatures (Classic Reprint) Book
PRACTICAL PYROMETRYCHAPTER I STANDARD TEMPERATURE SCALES1. The Comparison of Temperatures. - Lengths can be directly measured by means of a foot rule, a meter bar, a surveyor's chain or other standard of length. Similarly, volumes can be measured in terms of some standard of volume such as a gallon, bushel, or cubic foot. Temperatures, however, cannot be directly measured. In fact, temperatures can be compared only indirectly in terms of some property which changes in magnitude when temperature changes. For example, since when under constant pressure the length and volume of most substances increase as their temperature increases, changes of length and volume can be used for the comparison of temperatures.Again, since the pressure of a fixed mass of gas kept at constant volume increases … read more...
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