English: A drawing of the distribution of glass photo plates of the stars seen from the Southern hemisphere. The plates were analyzed by Dutch astronomer Kapteyn. The photos were taken by David Gill in South Africa. Each photo overlapped with some of the others.
Date
Source
Gill D., Kapteyn J.C. (1875) Cape Photographic Durchmusterung
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Captions
An overview of the glass plate photos distribution, analyzed by Kapteyn