Name/Title
Daniell's HygrometerEntry/Object ID
2013.3.19Description
An instrument for measuring the comparative moisture of the air. This hygrometer was first described in an article entitled, "On the new hygrometer," by J.F. Daniell, Esq., FRS and MRI. (Art XI in the Quart. Jour. Of Sciences, Literature, and the Arts. Vol IX, pp. 128-137. London, 1820.) The directions for the use of this instrument are also given by Negretti and Zambra (A Treatise on Meteorological Instruments, London, 1864). Daniell invented the electric cell in 1836 and also a pyrometer.
This case for this instrument illustrates the fate of the cases in which the early apparatus were stored. The instruments having been stored in their cases and the cases locked the keys were lost. At a later time, the cases were carelessly forced open and often split and badly damaged.
Our instrument was bought by Dr. Peter from Deleuil, Paris, in 1839.Collection
Moosnick Museum - Scientific Apparatus