View of a Brewster's Fringe Apparatus | Niels Bohr Library & Archives
Carnegie Institution of Washington publication. ACOUSTICS AND GRAVITATION. 75 be the index in measuring the fringe displacement. If the telescope with cross-hairs is so to be used, this must also be
Explore Scientific 80 mm FirstLight AR80 Refractor Telescope with iEXOS PMC-8 GoTo Equatorial Mount and Tripod | High Point Scientific Telescopes