Page 683 - 89 history of astronomy_opt

Souciet, 8 South, J., 133 Spectroscope, 89-
92 Spectroheliograph, 101 Spoerer, G. F.
W., 98 Spots on the sun, 84; periodicity of,
97 Stars, Parallax, 127; proper motion, 129;
double, 132; binaries, 132, 135; new, 19, 36,
137; catalogues of, 19, 36, 139; spectra of,
143 Stewart, B., 2, 100 Stokes, G. G., 91
Stone, E. J., 139 Struve, C. L., 130 Struve,
F. G. W,, 88, 115, 128, 133
683