Rudiments of the art of building : represented in five sections [...] for the use of architects, builders, draghtsmen, machinists, engineers and mechanics (1853)
Bullock, John · New York : Stringer & Townsend · leaf 166
mately beconnected, as in the case of new streets. It thereforebecomes of importance to have simple and accurate meansof ascertaining and recording the relative heights of differ-ent points. For this purpose both the spirit level and themason^s level are used. 301. Where the ground to be leveled… … In a convenient place, near the highest part of the ground,drive three stout stakes at equal distances from each other,and nail to them three pieces of stout plank, placed asshown in the cut, their upper edges being adjusted to thesame horizontal plane by means of the mason^s level. Thelevel being…
Building
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