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Caracteristicile produsului The Abney Level Handbook: How
- Brand: Hartley Amasa Calkins
- Categoria: Nature
- Magazin: libris.ro
- Ultima actualizare: 15-12-2024 01:42:32
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Descriere magazin:
This official handbook of the U.S. Forest Service explains how to use the
Abney hand level, a clinometer tool used to measure angles in various natural environments. The
Abney tool was invented by William de Wiveleslie
Abney, an English astronomer, during the 1870s. By the time the device was recognized and widely-used in the early 20 th century, it had been refined. Though earlier guides cover its basic usage, this U.S. government commissioned handbook offers exhaustive demonstration and instruction on the tool\'s abilities. The authors -
Hartley Calkins and Y. B. Yule - were themselves experienced reconnaissance surveyors with ample experience traversing and measuring the rugged woodland landscapes of North America. The Abney level is used to this day by land surveyors, geologists, foresters, and safety inspectors; in good hands, it is reliable for its accuracy. At roughly $60-100 in price it is affordable, durable, lightweight and - being handheld - portable. The Abney
Level Handbook , first published in 1927 and expanded in 1935, remains the authoritative source simply as it covers the subject exhaustively well. This edition faithfully reproduces the words and instructions given, and includes all of the diagrams, graphs, drawings and charts present in the 1935 version.