Tantalus Cup


This glass instrument— known as a tantalus cup or phythagorean cup, and used for parlor tricks and physics demonstrations—empties itself when the liquid reaches the height of the bend in the siphon. This example was used at Gettysburg College.

Ref: Benjamin Pike, Jr., Pike’s Illustrated Descriptive Catalogue of Optical, Mathematical, and Philosophical Instruments (New York, 1848), vol. 1, p.

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: 1982.0104.01Catalog Number: 1982.0104.01Accession Number: 1982.0104

Object Name: tantalus cup

Measurements: overall: 10 1/4 in; 26.035 cmoverall: 10 1/4 in x 5 1/2 in; 26.035 cm x 13.97 cm

Guid: http://n2t.net/ark:/65665/ng49ca746b2-6e83-704b-e053-15f76fa0b4fa

Record Id: nmah_1761381

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