A Manual of Experiments in Elementary Science: Teacher's Edition (1918)
Curtis, Francis D. · Charles E. Merrill Company · leaf 82
58 EXPERIMENTS IN ELEMENTARY SCIENCE clouded. As soon as this happens, again take the temperature of the ice and water. Explain that this temperature is the dew point. (See Fig. 39.) … of pumping air through the ether is to increase the evaporating surface of the ether, and hence to increase the rapidity with which the temperature falls. As soon as moisture begins to cloud the surface of the metal vessel, take the temperature, informing the class that this is the dew point. In…
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