Manuscripts
Mirror Boresight Accessories. Blueprints
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Carrying Case f/Mirror Boresight. Blueprints
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Quarter-Wave Plate in Mirror Reflex Sights
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Manuscripts, Miscellaneous
Manuscripts
Consists of: Notes on photographic emulsions. Paul W. Merrill (1 leaf/piece) Photography. Anonymous (9 leaves/pieces) Photography at the Mount Wilson Observatory. Anonymous (2 leaves/pieces) Progress in stellar spectroscopy. Anonymous (14 leaves/pieces) Spectroheliograms. Anonymous (2 leaves/pieces) Studies of cosmic rays. Thomas H. Johnson (7 leaves/pieces) Sunspots associated with magnetic storms. Anonymous (5 leaves/pieces) Threshold photography. Anonymous (3 leaves/pieces)
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