Barograph

Floating barograph, or self-registering barometer, designed by Alfred King, Liverpool, 1862. The instrument was operated at Liverpool Observatory, Bidston Hill, between 1863 and February 1940. The barometer tube is counterpoised to float in the cast iron cistern, which would have contained mercury when the instrument was operational. When atmospheric pressure falls, the tube rises and causes the frame, which would carry a pencil, to fall. The pencil thus inscribes a continuous record of atmospheric pressure onto a recording cylinder, rotated by clockwork. The record was magnified so that a change of pressure over 1 inch of mercury caused a change of 5 inches on the recording chart.

Floating barograph used at Liverpool Observatory, 1862

1862

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Open scale barograph by Short & Mason Ltd.

Balloon Barograph

Barograph by Moritz Pillischer, 1850

Balloon height barograph by R. Fuess

Aircraft barograph (locking drum) by Wilson

Barograph by Jakob Goldschmid, 1873-1876

Aeronautical pocket barograph, in small leather case

12 capsule aneroid barograph

Open scale barograph

Met Office marine barograph MkI. Ref no.966

Open scale barograph

Barograph clock by Alexander Cumming

Marine barograph in mahogany and glass case

Barograph retailed by Thomas Armstrong & Brother

Barograph, made by Thomas Armstrong & Brother.

A self-registering barograph, by Redier, 1875.

Kreil barograph by Dressler, 1841.

Microbarograph, 1903, designed by Shaw and Dines

Milne barograph, 1857.

Floating barograph used at Liverpool Observatory, 1862

Portable barograph

Mercury and ink for microbarograph

Microbarograph, 1903, designed by Shaw and Dines

Photobarograph used at Radcliffe Observatory, Oxford