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Actually the skies might not have been velvety black. I live in the Philippines and when 90 million people cook with wet fuel or charcoal the skies are more like mud than velvet.
H2 talks of amazingly bad nights in S.A..
If you read any Sherlock Holmes story they always mention the yellow atmosphere of London.
Granted they skies were undoubtedly better then than now in most cases but the scopes were also worse. H2's 20 feet reflector needed a ground crew to move it and had at the best 66% reflectivity.
Brian
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