Cased Hypsometer by Cary of London
This uncommon instrument first invented by the eminent scientist William Hyde Wollaston and later improved by numerous others, is used as a means to measure elevation using atmospheric pressure. Contained in a leather carry case, this compact travel hypsometer is comprised of a spirit burner, a water vessel with telescopic jacketed column, two varying scale thermometers and an outer black painted, two part canister in order to allow steam to circulate. All of the components are neatly arranged so that they can be stored conveniently whilst travelling. Circa 1890.
Condition: Good with wear consistent with age and use.
Dimensions: Weight 1000gm, Length 9cm in case, Width 7.5cm in case, Height 22.5cm in case.