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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Barograph clock by Alexander Cumming

Open scale barograph by Short & Mason Ltd.

Barograph clock by Alexander Cumming

Marine barograph in mahogany and glass case

Balloon height barograph by R. Fuess

Barograph by Jakob Goldschmid, 1873-1876

12 capsule aneroid barograph

Open scale barograph

Open scale barograph

Barograph by Moritz Pillischer, 1850

Aircraft barograph (locking drum) by Wilson

Aeronautical pocket barograph, in small leather case

Balloon Barograph

Components for Photobarograph

Part of portable barograph, British, 1909-1914

Escapement mechanism for portable barograph, British, 1909-1914

Barograph retailed by Thomas Armstrong & Brother

Met Office marine barograph MkI. Ref no.966

Barograph, made by Thomas Armstrong & Brother.

Portable barograph

Microbarograph, 1903, designed by Shaw and Dines

Photobarograph used at Radcliffe Observatory, Oxford

A self-registering barograph, by Redier, 1875.

Floating barograph used at Liverpool Observatory, 1862

Microbarograph, 1903, designed by Shaw and Dines

Milne barograph, 1857.

Kreil barograph by Dressler, 1841.

Mercury and ink for microbarograph

Kreil barograph by Dressler