Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge : University press · leaf 208
3. With reflector over objective forlamp illumination. 4. With attachment forelectric illumination. Five inch Micrometer Theodolite. Cambridge Observatory. TOPOGRAPHICAL SURVEY 151 is made on a different part of the circle, whereby accidental errorsof the circle graduation are to some extent…
Maps · Surveying
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