Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 227
ble limit oferror in such triangles. 253. The theodolite does not differ essentially in theprinciples of its construction and use from the transit, which hasalready been described. It is fitted with many appliances, foraccuracy in the observation and the reading of angles, which itis unnecessary to… … Fig. 181. SEC. I.] MAKING THE SURVEY. 221
Surveying
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