A system of geometry and trigonometry, together with a treatise on surveying ... Likewise, rectangular surveying ... To the whole are added, several mathematical tables, necessary for solving questions in trigonometry and surveying .. (1825)
Flint, Abel, 1765-1825 · Hartford, O. D. Cooke & co. · leaf 70
olumn by the northings orsouthings standing against them respectively; place the pro-ducts of those multiplied by the northings in the column ofnorth areas, and of those multiplied by the southings in the co-lumn of south areas; add up these two columns and subtractthe less from the greater; the… … 51. ...VH The dotted line A 2 represents the northing, and the line 2 Bthe easting made by the first course ; these multiplied together^that is, 77.15X20.74=1600.0910, which is double the area ofthe triangle A2B, as is evident from the Rule to find the area ofa triangle, Prob. IX. Rule 1. This…
Surveying
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