450 
PHILOSOPHICAL SOCIETY OE WASHINGTON. 
Page 
Treasurer, Annual Report of, 1900... 364 
- 1901. 385 
- 1902. 406 
- 1903. 421 
- 1904.. .. 437 
Triangulation, Rapid primary. J. F. 
Hayford . 415 
Triangles, Rational plane. A. Martin 373 
Trigonometry and navigation, Uses of 
drawing-board and scales in. 
R. A. Harris ,. 409 
Trufe, F. W. : Biographical notice of 
D. W. Prentiss. 358 
Typography, Genetic problem of. 
G. R. Stetson. 412 
Unalga Pass, Alaska, Currents in. 
L. P. Shidy . 388 
Universe, Recent views of the Simon 
Newcomb . 389 
Updegraff, M. : Errors due to imper¬ 
fections in pivots of a theodolite. 371 
— Stability of astronomical piers.... 388 
Uranus, System of. T. J. J. See. 359 
Van Orstrand, C. E. : The Emission 
function . 417 
— Load-strain function for finite 
strains . 431 
Variable intervals from a uniform- 
motion clockwork, Time signals 
of. C. G. Abbot. 400 
Vector-differentiation. A. Macfarlane 357 
Vertical, Computation of deflections of 
the, from topography. J. F. 
Hayford .'. 434 
Visit to Christiania. Simon New¬ 
comb . 402 
Visual perception, Rhythm in. E. A. 
Pace . 430 
Volcanoes, Mechanism of. G. K. Gil¬ 
bert . 398 
Waidner, C. W. : Measuring tempera¬ 
tures . 410 
— Temperature of the electric arc. . . 432 
Wainwright, D. B. : Longitude by 
wireless telegraphy . 387 
Walcott, C. D. : Carnegie Institution. 402 
Walker, G. T.: Boomerangs. 411 
Ward, L. F. : Sociology .. 393 
Page 
Water-soluble salts of field-soils. 
F. H. King. 413 
Water-vapor, Absorption-spectrum of. 
F. E. Fowler, Jr. 429 
Watkins, J. E.: History of marine 
propulsion . 358 
— A century of land transportation 
by steam . 372 
Wave motion. R. A. Harris. 358 
Wead, C. K. : Acoustics. 129, 357 
— Discontinuous and indeterminate 
functions . 65, 357 
— Elastic behavior of rubber bands. . 354 
— Peculiar musical instruments in 
National Museum . 394 
— Quadrature of circle . 377 
Weights and Measures, International 
Bureau of. L. A. Fischer. 424 
— --Office of Standard. L. A. 
Fischer . 367 
White, W. P. : Measuring intensity and 
damping of Hertzian waves. 433 
Wiley, H. W. : Food-preservatives... . 402 
— Paris Exposition. . 361 
Willoughby, W. F.: Paris Exposition. 361 
Winston, I. : International Auxiliary 
Language . 424 
— Thirteenth General Conference, In¬ 
ternational Geodetic Association. 366 
Wireless telegraphy, Longitude by. 
D. B. Wainwright. 387 
Wolf’s tables of sunspot frequency, 
Revision of, by A. Wolfer. C. 
Abbe . 397 
Wolfer, A., Revision of Wolf’s tables 
of sunspot frequency by. C. Abbe 397 
Wright, Carroll D.: Statistics__ 392 
Yellow fever, Transmission of, by 
mosquitoes. G. M. Sternberg. .. 376 
Zahm, A. F. : Atmospheric friction. .. 
247, 425 
— New methods of experimentation 
in Aerodynamics . 398 
Zenith distance, Cornu’s apparatus 
for determining. J. F. Hayford. 366 
Zone-observations of the Astrono- 
mische Gesellschaft. A. N. Skin¬ 
ner . 409 
Zuyder Zee, Draining of. J. H. Gore. 388 
