Details

G-8

Barometer: Aneroid

Silvered scale divided for pressure, 21-31 inches every 100th, and altitude, 0-10,000 feet every 50 feet. Blued needle. Needle adjustment screw on back. Brass needle marker adjusted by a central knurled screw. Bevelled glass cover. Bimetallic compensation for temperature. Cylindrical gilt copper case with suspension ring. The provision of a scale for height as well as barometric pressure was first suggested to Negretti and Zambra by the Astronomer Royal, George Airy (1801-1892). This barometer belonged to the notable amateur astronomer and specialist in visual double stars, S. W. Burnham.

"Negretti & Zambra, LONDON, 3407 COMPENSATED"

c. 1864

copper, gilt copper, glass, paint

England

	Imperial(in)		Metric(cm)
Height			15.2
Width			12.1
Depth			5.6
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter