1 matching record(s)
U [Petrie, William]
The Apostadometer. A New Surveying Instrument for Measuring the Distances of Inaccessible Objects by a Direct Reading Without Calculation, Giving also their Right Angled Direction | Applicable for Various Purposes, but Especially for Taking Offsets
Registered for William Petrie, Esq., by the sole makers, Holtzapffel & Co., Engine, Lathe, and Tool Manufacturers, 64, Charing Cross, and 127, Long Acre, London. 4 pages. Photocopy of original in the Whipple Museum of the History of Science, Cambridge.
[Unknown]
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