Observers using a refracting telescope of long focal length mounted on a tripod, and fitted with a simple plumb line and scale for measuring the altitude of the object being observed. Engraving from Oculus artificialis teledioptricus sive Telescopium by Johann Zahn (Nuremberg, 1702).
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Details
Creative#:
TOP09160353
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
NO
Property Release:
NO
Right to Privacy:
No
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