Barometers

Many people consult a barometer before going out, to see what the weather is likely to be. Barometers measure the general pressure of the atmosphere, which changes with the weather. The simple mercury barometer originated in seventeenth-century Italy and was soon copied in France and Britain. In the nineteenth century demand increased for domestic and scientific barometers. Since 1850 mercury barometers have been gradually ousted by aneroids, which are smaller and more robust but nowadays equally accurate.

Author: Anita McConnell
Publisher: Shire
Extra Details: Pictorial Card Covers, 6 x 9 inches tall, Illustrated with B&W photos and artworks throughout.