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Psychrometer
Public domain

Psychrometer

H. Geissler · 1846 · lead (metal); textile materials; wood (plant material); wax; mercury; brass (alloy); glass

From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.

About this work

Psychrometer-type hygrometer with two thermometers in a stand, incomplete. The scale of both thermometers ranges from -12° to +44° Celsius. One thermometer has a sock around the mercury bulb, which is moistened. The humidity of the air can be read from the temperature difference between the two thermometers, caused by the evaporation of the moisture. The base of the stand is weighted with lead.

Rijksmuseum, Amsterdam’s own description
Subjects
psychrometer
Credit linePsychrometer. 1846. H. Geissler. Rijksmuseum, Amsterdam. Public domain.
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