Accession No
2216
Brief Description
De Lisle’s reflecting clinometer, c.1920
Origin
England (?)
Maker
Class
surveying
Earliest Date
1920
Latest Date
1920
Inscription Date
Material
metal (brass, oxidised brass); glass; hide (leather); cloth (silk, velvet); wood
Dimensions
length (including shackle) 164mm; breadth 93mm; depth 23mm case length 158mm; breadth 88mm; height 42mm
Special Collection
Provenance
Transferred from Department of Geography, University of Cambridge, Cambridge, England, 05/1969.
Inscription
Description Notes
Heavy brass arc attached through vertical axis to oxidised brass frame divided vertically in half by reflector. Arc swivels from same plane as mirror frame to perpendicular plane. Counterweighted arm moves over scale on arc for measuring depression and elevation, graduated 1 in 5 - 1 in 50 (varying divisions; 28-1-2000). Brass shackle.
Fitted (?) papier mâché box. (Shaped wooden (?) box, covered in leather, lined with blue velvet and silk. Two pieces of paper inside, one about ‘Comparison with Stanley Abney level’ dated 14-10-1915, the other about the ‘Error of Clinometer’; 28-1-2000).
Condition: good; complete.
References
Events
Description
De Lisle’s reflecting clinometer
Clinometers measure angles of inclination. To measure the inclination to a distant object, you must look through the aperture to the object whilst at the same time keeping the centre of the eye reflected in the mirror and adjusting the weighted arm. The inclinations can then be read off from the scale, which is graduated from 1 in 5 to 1 in 50.
11/08/2006
Created by: updated by Ruth Horry on 11/08/2006
FM:39622
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