Hints on levelling operations : as applied to the reading of distances by the law of perspective, and the saving thereby of chainmen in a level survey : with remarks on the other advantages that can be gained in a survey by adopting this principle in the use of any ordinary levelling telescope and staff, by W. H. WELLS

Title:	Hints on levelling operations : as applied to the reading of distances by the law of perspective, and the saving thereby of chainmen in a level survey : with remarks on the other advantages that can be gained in a survey by adopting this principle in the use of any ordinary levelling telescope and staff
Author:	WELLS, W. H.
Note:	E. & F.N. Spon, 1879

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Subject:	Leveling
Subject:	Surveying
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