xii 
OFFICERS AND MEMBERS 
RiDGWAY, Robert 1030 South Morgan St., Olney, III. 
Rosa, Edward B Bureau of Standards, Washington, D. C. 
Russell, Henry Norris Princeton University, Princeton, N. J. 
Ryan, Joseph Harris Stanford University, California . 
McClung, Clarence E University of Pennsylvania, Philadelphia, Pa. 
McCollum, Elmer V School of Hygiene and Public Health, Baltimore, Md. 
Sargent, Charles S Arnold Arboretum, Jamaica Plain, Mass. 
SchlESinger, Frank Yale University Observatory, New Haven, Conn. 
ScHUCHERT, Charles Yale University, New Haven, Conn. 
Scott, William B Princeton, N. J. 
Seares, Frederick HanlEy Mt. Wilson Observatory, Pasadena, Cal. 
Setchell, William Albert University of California, Berkeley, CaL 
Smith, Alexander Columbia University, New York, N. Y. 
Smith, Edgar F University of Pennsylvania, Philadelphia, Pa. 
Smith, Erwin F Bureau of Plant Industry, Washington, D. C. 
Smith, Theobald Rockefeller Institute Medical Research, Princeton, N. J. 
Squier, George Owen Chief Signal Officer, U. S. A., Washington, D. C 
Stebbins, Joel University of Illinois Observatory, Urbana, III. 
StiEgliTz, Julius University of Chicago, Chicago, III. 
Story, William E Clark University, Worcester, Mass. 
Stratton, Samuel Wesley Bureau of Standards, Washington, D. C. 
Taylor, David Watson Department of the Navy, Washington, D. C. 
Thaxter, Roland Harvard University, Cambridge, Mass. 
Thomson, Elihu Swampscott, Mass. 
Thorndike, Edward Lee Columbia University, New York, N. Y. 
Trelease, William University of Illinois, Urbana, III. 
Trowbridge, Augustus Princeton, N. J. 
Trowbridge, John Harvard University, Cambridge, Mass. 
Ulrich, E. O U. S. Geological Survey, Washington, D. C. 
Van VlEck, E. B University of Wisconsin, Madison, Wis. 
Vaughan, Victor Clarence University of Michigan, Ann Arbor, Mich. 
VeblEn, Oswald Princeton University, Princeton, N.J. 
Verrill, a. E 53 Rolston St., Whitneyville, Conn. 
Walcott, Charles D Smithsonian Institution, Washington, D. C. 
Webster, Arthur G Clark University, Worcester, Mass. 
Welch, William H 80^ St. Paul St., Baltimore, Md. 
Wells, Horace L Yale University, New Haven, Conn. 
Wheeler, William M Harvard University, Cambridge, Mass. 
White, David U.S. Geological Survey, Washington, D. C. 
White, Henry Seely Vassar College, Poughkeepsie, N. Y. 
Whitney, Willis Rodney General Electric Co., Schenectady, N. Y. 
WiLCZYNSKi, Ernest Julius University of Chicago, Chicago, III. 
Willis, Bailey Stanford University, California. 
Wilson, Edmund B Columbia University, New York, N. Y. 
Wilson, Edwin Bidwell. . . .Massachusetts Institute of Technology, Cambridge, Mass. 
Wood, Robert W Johns Hopkins University, Baltimore, Md. 
Woodward, Robert S Carnegie Institution, Washington, D. C. 
Smith, Sidney I Yale University, New Haven, Conn. 
FOREIGN ASSOCIATES 
Adams, Frank Dawson McGill University, Montreal. 
Arrhenius, S. a Nobelinstiiut, Stockholm. 
