This heavy glass vessel open at both ends is designed for used with an air pump. When the air evacuated, a bladder (or hand) put over the top opening will be drawn into the vessel. The form has been used for physics demonstrations since the eighteenth century.
Ref: George Adams, A Catalogue of Optical, philosophical, and mathematical instruments (London, ), p. 8.
G. P. Quackenbos, A Natural Philosophy (New York, 1860), pp. 180-181.
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