Wauchope, Joseph Alliene, 1873- · Chicago, Scott, Foresman and Company · leaf 44
or both cases asto amount and temperature of water and timeconsumed. PART II Apparatus.— Two barometer tubes; mercury; cup;pointed bent tube with rubber bulb attached. Directions.—With the assistance of the instructorfill the tubes with mercury and invert in the cup ofmercury. Note that the mercury… … difference in the heights of the mer-cury in the two tubes. The reasonthe mercury falls in the tube Bis because the water evaporates untilthe upper part of the tube is filledwith saturated water vapor, exertinga downward pressure on the mercury.Now raise the temperature of thewater by holding a gas…
Physics
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