Rectangular black box mounted vertically on a black metal column; copper tubes on either side with nozzles and stopcocks that feed into the flat top; a third copper tube leads up to a small cup; glass windows opposite each other on body; brass post mounted behind apparatus with ring clamp reaching above top of body; circular brass base.
Accession Number: 2009.uc.19
Primary Materials: metal, copper, glass, brass
Old Inventory Number = “uc19”. Base labeled “no. 65 L. Golaz Constr. 24 rue des Fosses St. Jacques, Paris 1880”.
Dimensions (cm): Height = 24.5 , Base diameter = 10
Used for the precise determination of relative humidity.
Manufacturer: L. Golaz, Paris
Date of Manufacture: c.1880
Department of Physics, University of Toronto
Additional Information and References:
Invented by Alluard in 1877. A similar instrument is found in the Humboldt State University Collection (see Links). Also see W.E. Knowles Middleton (1969). Invention of the Meteorological Instruments.