Hygrometer
Negretti and Zambra
Category
Scientific instruments
Date
Unknown
Materials
Metal, glass, mercury
Measurements
12.375 ins (h)5.125 ins (w)
Order this imageCollection
Shaw's Corner, Hertfordshire
NT 1274907
Summary
A Negretti and Zambra horticultural hygrometer. Cast alloy frame, sheet metal pitched roof, 2 lugs for hanging, painted white. White enamelled scale, black markings; dry bulb thermometer at left, wet bulb (with reservoir below) at right, rotating cylinder in centre for converting temperature difference to relative humidity.
Provenance
Bequest of George Bernard Shaw, 1950
Makers and roles
Negretti and Zambra, manufacturer