Rare Ainsworth Pocket Transit Compass with Leather Case
Rare American D.W Bruntons, Ainsworth pocket Transit compass, made for surveying on or under the ground, incised D. W. Brunton's Pat. Sept. 18, 1894 Apr. 14, 1914 Wm. Ainsworth & Sons Sole Manufacturers Pat. Oct. 2 12. May 27. 13. Denver, Colo. U. S. A., serial number 2037, with leather case, in working order catalogue note: used by John Armstrong in the early days of Broken Hill and Cobar to plot the dip, strike and direction of sedimentary ore carrying beds. John Armstrong was the chief metallurgist for the old 'Proprietary Mine' at Broken Hill in the late 1800s and later General Manager of the 'Great Cobar Mine' until 1908
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- Incised - A record of a name, date or inscription, or a decoration scratched into a surface, usually of a glass or ceramic item with a blunt instrument to make a coarse indentation. Compare with engraving where the surface is cut with a sharp instrument such as a metal needle or rotating tool to achieve a fine indentation.
This item has been included into following indexes:
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surveyor's equipment
- compass 13
- instruments 39
