Hermann Johann Philipp Sprengel, German chemist c 1880-1890.

 
Hermann Johann Philipp Sprengel, German chemist c 1880-1890.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

Photograph of Hermann Johann Philipp Sprengel (1834-1906) who invented a new type of vacuum tube (1865) and devised the U-tube method for comparing liquid densities.

Image Details

Image Ref.
 
10321233

© Science Museum / Science & Society Picture Library

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