. Practical physics. Fig. 144. Methodof finding the 0°point in calibrat-in<i a thermometer Fig. 145. Methodof finding the lOO*point in calibrat-inti- a thermometer THERMOMETRY 131 too 90 ^ of melting ice to that of steam under a pressure of 70 thermometer in which the scale is divided in this way iscalled a centigrade thermometer. Thermometers graduated on the centigrade scale are usedalmost exclusively in scientific work, and also for ordinarypurposes in most countries which have adopted the metricsystem. This scale was first devised in 1742 by Celsius, ofUpsala, Sweden. For this reas
. Practical physics. Fig. 144. Methodof finding the 0°point in calibrat-in<i a thermometer Fig. 145. Methodof finding the lOO*point in calibrat-inti- a thermometer THERMOMETRY 131 too 90 ^ of melting ice to that of steam under a pressure of 70 thermometer in which the scale is divided in this way iscalled a centigrade thermometer. Thermometers graduated on the centigrade scale are usedalmost exclusively in scientific work, and also for ordinarypurposes in most countries which have adopted the metricsystem. This scale was first devised in 1742 by Celsius, ofUpsala, Sweden. For this reason it is sometimes called theCelsius instead of the centigrade scale. According to the kinetic theory an increase in temperature ina liquid, as in a gas, means an uicrease in the mean kineticenergy of the molecules; and, conversely, a decrease in tem-perature means a decrease in this average kinetic 156. Fahrenheit thermometers. The com-mon household thermometer in England andthe United States differs from
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
