| Sabin, Florence Rena |
0775 |
| Sabine, Wallace C.W. |
0705, 0761 |
| Salmon, Daniel E. |
0575 |
| Sanderson, Ezra Dwight |
0912 |
| Sargent, Charles Sprague |
0537, 0714 |
| Sauveur, Albert |
0711, 0735 |
| Savage, Thomas S. |
0265 |
| Saxton, Joseph |
0239, 0301 |
| Say, Thomas |
0051, 0089, 0097, 0111, 0125, 0156 |
| Schoolcraft, Henry R. |
0168, 0306 |
| Schuchert, Charles |
0728, 0921 |
| Science |
0568, 0703, 0760 |
| Scientific American |
0247 |
| Scudder, Samuel H. |
0385, 0523, 0633 |
| Sedgwick, William T. |
0590 |
| Seismological Society of America |
0852 |
| Shaler, Nathaniel Southgate |
0656 |
| Shaw, Henry |
0350 |
| Shepard, Charles U. |
0170 |
| Sherrill, Miles |
0784 |
| Sidereal Messenger |
0253 |
| Sierra Club |
0676 |
| Sigma Xi |
0593 |
| Silliman, Benjamin |
0037, 0059, 0066, 0102, 0106, 0155, 0200, 0210, 0254, 0390 |
| Silliman, Benjamin, Jr. |
0254, 0258, 0330, 0354 |
| Skinner, John Stuart |
0107 |
| Slipher, Vesto Melvin |
0891 |
| Smith, Erwin Frink |
0838 |
| Smith, James Edward |
0019 |
| Smith, John Lawrence |
0236 |
| Smith, Sidney I. |
0462 |
| Smith, Theobald |
0683 |
| Smithson, James L.M. |
0152 |
| Smithsonian Institution |
0152, 0211, 0249, 0277, 0285, 0286, 0345, 0373, 0401, 0429, 0466, 0487, 0517, 0788 |
| Smithsonian Institution Astrophysical Observatory |
0647 |
| Smithsonian Institution Bureau of American Ethnology |
0531, 0871 |
| Society for Experimental Biology and Medicine |
0803 |
| Society for Plant Morphology and Physiology |
0727, 0850 |
| Society for the Promotion of Agriculture, Arts, and Manufactures |
0020 |
| Society of American Bacteriologists |
0742 |
| Society of Experimental Psychologists |
0817 |
| Springfield Armory |
0011 |
| Squier, Ephraim G. |
0277, 0498 |
| Stallo, Johann Bernhard |
0555 |
| Standard Oil Company |
0428 |
| Steinmetz, Charles Proteus |
0729 |
| Stephens, John Lloyd |
0215 |
| Stevens Institute of Technology |
0443 |
| Stevens, John |
0041 |
| Stevens, Nettie Maria |
0828 |
| Stewart, George Neil |
0707 |
| Stiles, Charles Wardell |
0785, 0901 |
| Stratton, Samuel Wesley |
0777 |
| Sullivant Moss Society |
0733 |
| Sullivant, William S. |
0270, 0573 |
| Sutton, Walter Stanborough |
0796 |
| Sylvester, James Joseph |
0219, 0486, 0514 |
