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Pocket altazimuth compass-clinometer, British, 1871-1893

Pocket altazimuth compass-clinometer, British, 1871-1893

1871-1893
Prismatic magnetic compass, British, 1827-1848

Prismatic magnetic compass, British, 1827-1848

1827-1848
Fahrenheit thermometer

Fahrenheit thermometer

1826-1854
Brunton pocket transit compass with case by E.R. Watts, c.1930

Brunton pocket transit compass with case, 1925-1930

1925-1930
Prismatic magnetic compass, Verner type pattern, Mk VIII, adapted for night marching, unsigned, British, 1918

Prismatic magnetic compass, British, 1918

1918
ML-ZW X-ray tube by Machlett. England, 1938-1955

ML-ZW X-ray tube by Machlett. England, 1938-1955

1938-1955
Electrically illuminated liquid prismatic compass by Kelvin, Bottomley and Baird, early 20th century

Surveying compass, British, 1913-1920

1913-1920
Photograph of Amsler current meter by Stanley, 1915

Photograph of Amsler current meter by Stanley

1915
Clinometer patent by C. A. Schmalcalder, 82 Strand, London, England, 1810-1826.

Patent clinometer, British, 1810-1826

1810-1826
Electrically illuminated liquid prismatic compass by Kelvin, Bottomley and Baird, early 20th century

Part of surveying compass, British, 1913-1920

1913-1920
ML-IK dental X-ray tube, by Keleket, England, 1938-1955

ML-IK dental X-ray tube

1938-1955