Spencer, position of nebulæ, [422]
Spitaler, attendants on Brooks's comet, [366]
Spitta, transits of Jupiter's satellites, [292]
Spörer, solar rotation, [148] [149];
chromosphere, [199] [200]
Stannyan, early notice of chromosphere,[ 68]
Star catalogues,[ 28],[ 31],[ 32],[ 60], [414] [415];
spectroscopic, [381] [385] [386]
photographic, [412]-414
photometric, [420] [421]
Star-drift, [426]
Star-gauging,[ 13],[ 19],[ 47]
Star-maps,[ 77],[ 78],[ 81], [284] [413] [415];
photographic, [413] [414]
Stars, movements, 9,[ 10],[ 35],[ 39], [415] [426];
radial, [386] [387] [406]
comparative brightness,[ 13],[ 49],[ 50], [420] [421]
distances, 35-37, [416]-418
chemistry, [372] [381] [382]
spectroscopic orders, [373]
colours, [374]
development, [375]-377
actual magnitudes, [422]
gregarious, [426]