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A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)

Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 234

An illustration from A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart, 1875, leaf 234
nen. If polished with oil, they should be rubbedmore strongly. The parts neither varnished nor oiled, shouldbe cleaned with Spanish white and alcohol. Varnished wood, when spoltt-d.should be wiped with very soft linen, moistened with a little olive oil or alcohol,[npainted wood is cleaned with… … 228 fPART !▼ CHAPTER 11. VEMIERS. (343) Definition. A Vernier is a contrivance for measuringsmaller portions of space than those into which a line is actuallydivided. It consists of a second line or scale, movable by the sideof the first, and divided into equal parts, which are a very littleshorter…

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