Refraction, atmospheric,[ 31];
effects looked for in comets, [106] [353]
Cytherean, [235] [253] [254]
lunar [263] [264]
Reichenbach, foundation of Optical Institute,[ 28],[ 34], [122]
Repsold, astronomical circles,[ 41], [122];
Cape heliometer, [416]
Resisting medium,[ 93],[ 94], [360]
Respighi, slitless spectroscope, [173];
prominences and chromosphere, [194] [196] [199]
solar uprushes, [205]
spectrum of γ Argûs, [380]
Reversing layer, detected, [171] [172];
photographed, [172] [189]
depth, [173]
Riccioli, secondary light of Venus, [255]
Riccò, trials with coronagraph, [180];
distribution of prominences, [199]
spectrum of Venus, [254]
spot on Jupiter, [294]
spectrum of great comet, [364]
Richer, distance of the sun, [228]
Ristenpart, solar translation,[ 40]