1887

oa MNASSA : Monthly Notes of the Astronomical Society of South Africa - Telescopes and accesories

 

Abstract

Describing photographic telescopes, Mr. Borcherds pointed out that they differed little in principle from the visual instruments. Of the two types in general use the refractor was, until recently, the better instrument.

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/content/mnassa/4/10/AJA00248266_4788
1945-01-01
2016-12-04
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