Demainbray's syphon

Made:
1701-1752
Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow copper pipe which acts as a Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow copper pipe which acts as a Syphon or "Tantalus" cup. Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow Syphon or "Tantalus" cup. Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow

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Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow copper pipe which acts as a
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow copper pipe which acts as a
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Syphon or "Tantalus" cup. Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow
Science Museum Group
© The Board of Trustees of the Science Museum, London

Syphon or "Tantalus" cup. Syphon or 'tantalus' cup. The small copper vessel has a handle made from a piece of hollow
Science Museum Group
© The Board of Trustees of the Science Museum, London

Syphon, unknwon maker, before 1753, but once belonged to Stephen Demainbray.

This small copper vessel has a handle made from a piece of hollow copper pipe which acts as a syphon. It once belonged to Stephen Demainbray who used it in his lectures on natural philosophy. J. T. Desaguliers, another lecturer in natural philosophy and at one point a mentor to Demainbray, described the device as a 'Tantalus cup' and described a demonstration that involved filling the vessel with water, adding an apple or orange to raise the level above that of the top of the handle, and watching the water run out through the handle until the vessel was almost empty. Demainbray worked as superintendent at the King's observatory at Kew from 1768 and his collection of instruments and apparatus was absorbed into the King's own collection.

Details

Category:
King George III
Object Number:
1927-1131
type:
syphons
taxonomy:
  • furnishing and equipment
  • tools & equipment
credit:
King's College, London