448 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page 
Profesors in France, Selecting. F. G. 
Radelfinger . 356 
Propulsion, Marine screw. G. W. 
Littlehales . 358 
— History of marine. J. E. Watkins 358 
Psychology. E. A. Pace.. 893 
Putnam, G. R. : Connection between 
gravity-stations of Europe and 
America . 360 
Quadratics, Can equations be solved 
by ? M. Baker . 401 
Quadrature of the circle. C. K. 
Wead . 377 
-C. G. Abbot. 410 
Radelfinger, F. G. : Analytic represen¬ 
tation of complex functions. 227, 409 
— Diverging series . 361 
— Linear differential equations. 21 
— Mathematics . 157, 371 
— Selecting professors in France. . . . 356 
— Series met with in differentiating 
a complex variable .. 379 
Radiation and terrestrial temperature. 
C. G. Abbot ... 433 
— of gases, Electron-theory of. P. G. 
Nutting . 422 
— Solar constant of. C. G. Abbot. . 423 
Radio-active substances. H. C. Bolton 358 
Rainbow observed in dew. L. J. 
Briggs . 391 
Rapid primary triangulation. J. F. 
Hayford .,. 415 
Rational plane triangles. A. Martin. 373 
Raymond. G. L. : Esthetic principles 
of music . 357 
Recent views of the universe. Simon 
Newcomb . 389 
Reclassification of science-section in 
Library of Congress. J. D. 
Thompson . 399 
Records, Phonographic, which promise 
absolute permanence. R. II. 
Strother . 369 
Report, Annual, Secretaries, 1900.... 362 
-Treasurer, 1900 . 364 
-Secretaries, 1901 . 380 
-Treasurer, 1901 . 385 
-Secretaries, 1902 . 403 
— -Treasurer, 1902 .. 406 
-Secretaries, 1903 . 419 
-Treasurer, 1903 .. 421 
-Secretaries, 1904 .. 435 
-Ti’easurer, 1904 . 437 
— of Committee on Mathematical 
Science ........... 1, 139, 205, 408 
-Committee on Physical Science. 93 
Rhythm in visual perception. E. A. 
Pace . 430 
Page 
Roemer, Olaus, Sketch of, by T. J. J. 
See . .. 413 
Roman Forum, Recent excavations 
in. Mitchell Carroll . 354 
Rosa, E. B. : Buildings of National 
Bureau of Standards. 400 
— Bureau of Standards . 423 
Roots, Ambiguity of double sign ± 
in extraction of. J. II. Gore. . .. 394 
Rubber bands, Elastic behavior of. 
C. K. Wead. 354 
Rudolph II, 1570-1612, Science and 
art under. H. C. Bolton. 401 
Salts of field-soils, Water-soluble. 
F. H. King .. 413 
Sampson, W. T., Obituary notice of, 
by G. W. Littlehales.. 308, 415 
Schott, C. A. : Arc measurements.... 366 
— Obituary notice of, by O. H. Titt- 
mann . 312, 377 
Science and art under Rudolph II, 
1570-1612. H. C. Bolton... 401 
Sciences, Definition of modern.. 392 
— represented in Philosophical So¬ 
ciety. W. H. Dali. 392 
Science-section in Library of Congress, 
Reclassification of. J. D. Thomp¬ 
son . 399 
Secretaries, Annual Report of, 1900.. 362 
--1901. 
380 
-- 1902_ 
403 
- 1903. 
419 
- 1904. 
435 
Secular variation of 
earth’s 
magnet- 
ism, Magnetic 
forces 
causing, 
L. A. Bauer. . .., 
431 
-magnetic declination in the 
United States. D. L. Hazard... 391 
-Earth’s permanent magnetism 
and its. L. A. Bauer.. 418 
See, T. J. J. : Astronomy. 371 
— Astronomy in 1899, 1900. 17, 145, 355 
— Diameter of planets .. 379 
— Double stars i Cygni and 95 Ceti. 354 
— Sketch of Olaus Roemer.. 413 
— System of Uranus. 359 
Seismograph, The. C. F. Marvin.... 410 
Series, Diverging. F. G. Radelfinger. 361 
— met with in differentiating a com¬ 
plex variable. F. G. Radelfinger. 379 
Shellabarger, Samuel, Biographical 
ketch of, by M. Baker. 356 
Shidy, L. P. : Currents, Unalga Pass, 
Alaska .. ... 388 
— Tides ..... 117, 356 
Skinner, A. N. : Zone-observations of 
the Astronomische Gesellschaft. . 409 
