John Theophilus Desaguliers, French-born scientist and inventor, 1725.
4 0 c m
 
31cm
actual image size: 23cm x 32cm

John Theophilus Desaguliers, French-born scientist and inventor, 1725.

Pelham, Peter

© Science Museum / Science & Society Picture Library

Description

Engraving by P Pelham after an original painting by H Hysing. Desaguliers (1683-1744), a French-born British inventor and scientist, became experimental asistant to Sir Isaac Newton. He designed a project to heat salt-boilers and similar vesels by steam rather than fire. He added a safety valve to Thomas Savery's steam engine, which along with an internal water jet, condensed the steam in the displacement chambers, improving the design. He appears here holding a magnifying glas, with a glas prism on the table.
 

Artist

 

Image Ref.

10198873
 

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