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Images Dated 14th November 1989

Choose from 10 pictures in our Images Dated 14th November 1989 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Illustration of thermoscope Featured 14 Nov 1989 Print

Illustration of thermoscope

Illustration depicting Robert Fludd's thermoscope (centre), an early air thermometer, drawn in the centre of a globe representing the universe. Fludd (1574-1637) was a religious mystic who sought to bring together the macrocosm of the universe with the microcosm, man. He believed that circling of the Sun around the Earth caused the circulation of air & blood in the body. A universal expansion & contraction affected both macrocosm & microcosm, & was visible in the thermoscope. The thermoscope consists of an air-filled bulb (top) connected to a reservoir of water (bottom) by a graduated tube. The air in the bulb expands & contracts with temp- erature, causing the water level to rise & fall