
4 0 c m
28cm
actual image size: 20cm x 32cm
Description
Plate from 'Traittez des Barometres, Thermometres et Notiometres ou Hygrometres' (1688) by J D'Alence. A natural philosopher is shown demonstrating how a column of water can be raised and lowered in a glas tube by manually warming the air trapped in the upper flask. The instrument is thus behaving like an air thermometer rather than a barometer. This book is a pocket-sized treatise on the barometer, thermometer and hygrometer. Its plates are particularly early illustrations of natural philosophers at work.
Image Details
Image Ref.
10313315
© Science Museum / Science & Society Picture Library