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Inclinometer

From the Collection of Myrtleford and District Historical Society 29 Elgin Street Myrtleford Victoria

Description
Hand held brass pocket inclonometer level, circa 1920. Leather case for safe storage.
Semi circular graduated dial with 90 degree vernier scale with a small (20mm) magnifying glass to aid reading the vernier scale. Above the body, mounted at the rear of the graduated dial, is a spirit level tube which is tilted by finger movement to the milled hand wheel.
The height to be determined is sighted through the instrument eyepiece and the bubble tube is tilted until the bubble, viewed in the mirror inside the sighting tube, is brought level with the graticule sighted at the top of the subject object. An angle is thus obtained and by measuring the distance on the ground to the object, trigonometry can be applied to determine the height of the object.
Size
Body 20mm square, 175mm long. Height to top of vernier scale 62mm. Leather case 180mm x 50mm
Object Registration
2000
Historical information
Provenance not clear. Leather case has 'MMBW' inscribed in black pen, indicating an association with Melbourne Metropolitan Board of Works. Item has been in the possession of Terry McCormack since 1972
When Made
Early 20th Century
Inscriptions & Markings
Herga & Co. BRISBANE. Made in England
Last updated
20 Feb 2018 at 2:40PM