Hand or Bladder Glass


This swelled glass vessel open at both ends is designed for tactile experience of air pressure. In use, the larger end is placed on the plate of an air pump, the observer’s hand is placed on the smaller end, and the air is pumped out. Or, the smaller end can be placed on the plate, and the larger end covered with a bladder of some sort.

Ref: Benjamin Pike, Jr., Illustrated Descriptive Catalogue of Optical, Mathematical and Philosophical Instruments (New York, 1848), vol. 2, pp. 201-202.

Location: Currently not on view

See more items in: Medicine and Science: Physical Sciences


Exhibition Location:

Data Source: National Museum of American History

Id Number: PH.315401.18Catalog Number: 315401.18Accession Number: 219414

Object Name: bladder glass

Measurements: overall: 9 1/8 in x 7 1/2 in; 23.1775 cm x 19.05 cmoverall: 9 1/8 in x 7 1/2 in; 23.1775 cm x 19.05 cm

Guid: http://n2t.net/ark:/65665/ng49ca746ad-507e-704b-e053-15f76fa0b4fa

Record Id: nmah_1390937

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