Guericke's air thermometer, 1672.
4 0 c m
40cm
actual image size: 32cm x 32cm

Guericke's air thermometer, 1672.

© Science Museum / Science & Society Picture Library

Description

Plate from Otto von Guericke's 'Experimenta Nova Magdeburgica'. This thermometer was over twenty feet in length and this plate shows how it would have been fixed to a wall of a house. The instrument on the left consists of a large copper sphere to which is attached one arm of a long U-tube containing alcohol. The other arm, on the right, is open to the air, and within it hangs a float counterbalanced by a figure of an angel which serves as an indicator on a scale of seven degrees, from 'great heat' to 'great cold'.
 

Image Ref.

10311902
 

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