A group of five gilt brass aneroid pocket barometers Various makers, late 19th and early 20th century Each with circular silvered register incorporating rotating outer scale calibrated for altitude in feet divided into fiftieths and the inner scale calibrated for barometric inches, the first signed Husbands, Optician, BRISTOL; the second Kelvin & James White Ltd., GLASGOW; the third NEGRETTI & ZAMBRA, LONDON, 9355; and the fourth inscribed Hutchinson's Improved Surveying Aneroid..., each in gilt pocket watch type case with altimeter scale adjustment either by manual rotation of the bezel or via a knurled crown within the suspension ring, diameters 5cm (2ins) and smaller, all with leather covered outer cases, together with an unusual silver cased miniature aneroid pocket barometer the engine-turned register numbered 1196 to centre with fixed inner scale annotated 10-40 divided into single increments within 50-110 outer scale divided into half increments and signed KROHNE & SESEMANN, PATENT, LONDON to lower edge, in silver pocket watch type case with suspension loop, (unmarked), 2.8cm (1.125ins) diameter, in velvet lined outer case, (6).