PRENTISS, DR. D. WEBSTER, _a_, 1101 Fourteenth Street. PRINCE, HON. L. BRADFORD, _c_, Santa Fe, N. M. PROWELL, GEO. R., _c_, Hanover, Pa. PUMPELLY, PROF. RAPHAEL, U. S. Geological Survey, Newport, R. I. RAMSEY, F. M., _c_, Lampasas, Tex. RANKIN, REV. DR. J. E., Howard University. REID, PROF. HARRY FIELDING, _c_, Case School of Applied Science, Cleveland, O. RENSHAWE, JNO. H., _a_, Geological Survey. RICE, PROF. WM. NORTH, _c_, Wesleyan University, Middletown, Conn. RICHARDSON, DR. C. W., 1102 L Street. RICHARDSON, T. J., _c_, 734 E. Fifteenth Street, Minneapolis, Minn. RICHMOND, CHAS. W., In care U. S. Consul, Greytown, Nicaragua. RICHTER, MISS C. M., 330 A Street SE. RICKSECKER, EUGENE, _a_, _c_, P. O. Box 289, Seattle, Wash. RITTER, H. P., _a_, Coast and Geodetic Survey. RIZER, COL. H. C., Geological Survey. ROBBINS, A. G., _c_, Massachusetts Institute of Technology, Boston, Mass. ROBERTS, A. C., _a_, Hydrographic Office. ROCHESTER, GEN. WM. B., U. S. A., 1320 Eighteenth Street. ROCK, MILES, 1430 Chapin Street. ROGERS, JNO. B., _c_, Columbia Athletic Club. ROTCH, A. LAWRENCE, 3 Commonwealth Avenue, Boston, Mass. RUSSEL, LIEUT. EDGAR, U. S. A., _c_, Fort Sam Houston, San Antonio, Tex. RUSSELL, ISRAEL C., _a_, Geological Survey. {xxxi} SANDERS, HENRY P., 1504 Twenty-first Street. SARGENT, PROF. C. S., _a_, Brookline, Mass. SCHAAP, C. H., _c_, P. O. Box 32, Sitka, Alaska. SCHLEY, CAPT. W. S., U. S. N., _a_, Navy Department. SCHMIDT, FRED. A., 504 Ninth Street. SCHMITT, EWALD, 2235 Thirteenth Street. SCHWATKA, FREDERICK, _c_, 1108 First Avenue, Rock Island, Ill. SCIDMORE, MISS ELIZA RUHAMAH, 1502 Twenty-first Street. SCOTT, W. O. N., 603 Fifteenth Street. SCUDDER, PROF. S. H., _a_, Cambridge, Mass. SHALER, PROF. N. S., _a_, 25 Quincy Street, Cambridge, Mass. SHEPARD, PROF. EDWARD M., Drury College, Springfield, Mo. SHEPARD, J. L. N., _c_, 402 Front Street, San Francisco, Cal. SHEPARD, CAPT. L. G., U. S. R. M., Treasury Department. SINCLAIR, C. H., Coast and Geodetic Survey. SINCLAIR, J. C., 718 Arch Street, Philadelphia, Pa. SLOAN, ROBERT S., _c_, Oswego. N. Y. SMITH, EDWIN, _a_, Coast and Geodetic Survey. SMITH, REV. ERNEST C., _c_, Framingham, Mass. SMITH, PROF. EUGENE A., _c_, University, Ala. SMITH, MIDDLETON, _a_, P. O. Box 572. SMOCK, DR. J. C., _c_, State Geological Survey, Trenton, N. J. SNELL, MERWIN-MARIE, Catholic University of America. SOMMER, E. J., _a_, Coast and Geodetic Survey. {xxxii} SPENCER, JAS. W., Geological Survey. STANLEY-BROWN, JOSEPH, Geological Survey. STANWOOD, JAMES HUGH, _c_, Massachusetts Institute of Technology, Boston, Mass. STEDMAN, J. M., _c_, Trinity University, Durham, N. C. STEIN, ROBERT, Geological Survey. STOCKTON, LT. COMDR. CHARLES H., U. S. N., _a_, _c_, Naval War College, Newport, R. I.