and the whole instrument oriented in the meridian by means of a magnetic compass in the base

Dry needle compass in a pocket watch-style brass case

Believed by some to have been designed in 1804 by the legendary British inventor and polymath Joseph Crabtree

L(42”/107cm)

Measures: length 10"

Galileo Thermometer, Mixed Colours DEXSHELL and the whole instrument orientedOur distinctive ornamental (but functional) thermometers utilise 17th century astronomer Galileo Galilei's discovery that the density of liquids varies with temperature. Carefully weighted glass globes are suspended in a liquid filled tube, where they sedately sink or float as the surrounding air gets hotter or colder. Temperature is indicated by the engraved brass tag on the lowest floating globe. Temperature is shown in Celsius. Sizes are shown when