Gregg, J. B. [from old catalog] · Ada, Ohio, The University herald press · leaf 43
as ordinates 32 THE FORCES OF NATURE.—IN GASES. EXPERIMENT 13. THE AIR PUMP. Method.— (1.) Connect a small receiver with the pump bymeans of a rubber tube. Place the hand firmly on the mouthof the receiver, and cautiouslyexhaust a part of the air. In using- the air pump, do notmake short strokes… … 3. Place some rubber tubingover the end of a sma Air Pump. tube; by suction, fill the tube with water to within a few centi-meters of the top; compress the tubing so that the water willremain at this point, and place it in a tall bell jar. Allow thelower end of the tube to dip into a vessel of…
Physics
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