Safarik, secondary light of Venus, [256];
compression of Uranus, [304]
Satellites, discoveries, [110] [282] [293];
transits, [291] [292]
variability, [292] [302]
origin, [309] [318]
Saturn, low specific gravity, [298];
rotation, [302]
spectrum, [303]
Saturn's rings, first disclosure,[ 85];
dusky ring,[ 86]
stability, [298] [300]
meteoric constitution, [300]
eventual dispersal, [301]
Savary, orbits of double stars,[ 46]
Savélieff, solar radiation, [164] [225]
Sawerthal, discovery of a comet, [366]
Schaeberle, discovery of Procyon's satellite,[ 42];
coronal photographs, [187] [188]
theory of corona, [191]
meteoric photography, [339]
discovery of a comet, [355]
Schaeberle and Campbell, observations of Jupiter's satellites, [292]
Scheiner, Father, nature of sun-spots,[ 52],[ 54];
equatoreal instrument, 120 note
solar rotation, [146]
darkening of sun's limb, [221]