Rowland, H. A., 92, 102
Rudolph H.,37, 39
Rumker, C., 139

Sabine, E., 98
Savary, 133
Schaeberle, J. M., 135
Schiaparelli, G. V., 110, 111, 124, 125
Scheiner, C., 87, 95, 96
Schmidt, 108
Schott, 88
Schroter, J. H., 107, 110, 111, 124, 125
Schuster, 98
Schwabe, G. H., 97
Secchi, A., 93, 144
Short, 87
Simms, J., 81
Slipher, V. M., 119
Socrates, 17
Solon, 15
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;