Richard meteorograph, 1899.

Richard meteorograph, 1899.
4 0 c m
actual image size: 25cm x 32cm


In order to discover the behaviour of the atmosphere at height, scientists developed lightweight equipment which they attached to kites or balloons. Richard Freres were one of the top three makers of the period. This example measured humidity with a hair hygrometer, temperature using a bimetallic strip and presure using an aneroid capsule. It is seen here without its case.

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© Science Museum / Science & Society Picture Library

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