Pocket aneroid barograph

Made:
1919 in Paris
maker:
Richard Frères
Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette; Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette; Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette; Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette; Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette;

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Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette;
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette;
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette;
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette;
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pocket aneroid barograph by Richard Freres, c. 1919. Paris, Ville de Paris, Île-de-France, France. leatherette;
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pocket aneroid barograph by Richard Freres, c 1919.

A barograph records changes in air pressure. This pocket instrument was designed as an altigraph, for use by mountaineers or airmen. The chart is printed to give heights up to 6000 metres. The pen, controlled by clockwork, makes a dot on the chart every half-minute, rather than a continuous trace.

Details

Category:
Meteorology
Object Number:
1919-517
Materials:
brass, leatherette, mahogany and nickel
type:
aneroid barograph
credit:
Meteorological Office, South Kensington