Opening Temple doors by fire on an altar, 1589.

 
Opening Temple doors by fire on an altar, 1589.
4 0 c m
 
30cm
actual image size: 22cm x 32cm

Description

Engraved diagram showing an alternative method of opening doors automatically. Heated air expands, and a system of chains, pulleys, and weights enables the doors to be opened automatically as long as a fire is burning. Illustration from 'Gli artifitiosi et curiosi moti spiritali di Herrone' (commonly called 'Pneumatics') by Hero of Alexandria, published in Ferrara in 1589.

© Science Museum / Science & Society Picture Library

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