566 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page 
Mexico, Gulf of, as a measure of isostacy. 
W J McGee. 504 
— Occurrence of iron in. R. T. Hill. 513 
Micrometer, A simple form of a double 
image. G. M. Searle. 509 
— screw, Method of determining the peri¬ 
odic error of a. George Davidson. 534 
Miocene climate in Arctic Siberia. W. H. 
Dali. 522 
Model globe, A. F. H. Bigelow. 522 
Modern munitions and engines of war in the 
United States artillery service. V. L. 
Mason.. 538 
Moon, Illustrations of the physical history 
of the [The moon’s face]. G. K. Gilbert. 
President’s address, 1893. 241, 513, 518 
Monsoons, The Texan. M. W. Harring¬ 
ton.... 293, 532 
Morse, Fremont: Recent astronomical work 
in Alaska. 533 
Mount Elbert, Colorado, Electrical phenom¬ 
ena on. P. A. Welker. 539 
— Ingalls, The lavas of. H. W. Turner. 512 
Mussey, R. D., Death of.. 519 
National University, Appointment of com¬ 
mittee on...... 539 
-Letter from J. W.'Hoyt regarding. 539 
— — Report of committee on. 539 
Newell, F. H., elected member....,. 507 
— Fluctuations of discharge of western 
rivers.503 
New Mexico, Silver deposits of Lake val¬ 
ley. W. Lindgren. 507 
New York, eastern, A few words on the geol¬ 
ogy of. T. N. Dale. 536 
Nichols, C. H., Obituary notice of, by J. M. 
Toner.....;.. 476, 511 
Notes on the Lower Paleozoic rocks be¬ 
tween the Susquehanna and Potomac 
rivers. C. D. Walcott...... 511 
Oblique aberration of achromatic tele¬ 
scopes. Wm. Harkness. 524 
Occurrence of iron in Mexico. R. T. Hill... 513 
Officers for 1893. 517 
- 1894 .. 530 
— — 1895 . 544 
Oxygen, Atomic weight of. F. W. Clarke... 534 
Paleozoic rocks between the Susquehanna 
and Potomac rivers, Notes on the. C. D. 
Walcott. 511 
Parry, C. C., Obituary notice of, by F. H. 
Knowlton. 497, 511 
Pendulums, Use of planes and knife edges 
in. T. C. Mendenhall. 520 
Philosophy of folk-lore. O. T. Mason. 521 
— Relation of, to psychology and physiology. 
J. Le Conte.. 19, 505 
Page 
Physiology, Relation of philosophy to psy¬ 
chology and. J. Le Conte. 19, 505 
Planes and knife edges in pendulums, Use 
of. T. C. Mendenhall. 520 
Prentiss, D. W., Obituary notice of E. T. 
Fristoe. 460, 537 
President’s address. See Address. 
Preston, E. D.: Mean density of the earth, 
369, 536 
— Remarks on the method of reducing the 
Waikiki observations for changes of lati¬ 
tude . 523 
Price of silver. Henry Farquhar. 523 
Psychology, Relation pf philosophy to 
physiology and. J. Le Conte. 19, 505 
— The new, and what is it? L. F. Ward. 506 
Pueblo arches. Ancient. F. H. Cushing. 523 
Putnam, G. R., elected member. 504 
Pyramidion of the Washington monument. 
B. R. Green..... 522 
Rain, The formation of. C. Abbe. 523 
Rainfall in Texas, Some peculiarities of. 
A. W. Greely. 53, 505 
— Relation of, to river rise. Thomas Rus¬ 
sell . 512 
Recent contributions toward the discussion 
of forest influences. B. E. Fernow. 512 
Recent observations of the infra-red spec¬ 
trum. S. P. Langley. 524 
Relation of rainfall to river rise. Thomas 
Russell. 512 
Rivers, Fluctuation of discharge of. F. H. 
Newell. 503 
River stage prediction. Thomas Russell... 507 
Russell, Thomas: Relation of rainfall to 
river rise. 512 
— River stage predictions. 507 
Scientific ballooning. H. A. Hazen. 510 
Searle, G. M.: A simple form of double im¬ 
age micrometer. 509 
Secretary’s report for 1892 .. 514 
— :- 1893. 526 
-1894.. 541 
Shidy, L. P.: Obituary notice of R. S. Avery. 435 
Siberia, Miocene climate in Arctic. W. H. 
Dali. 522 
Silver deposits of Lake valley, New Mexico. 
W. Lindgren. 507 
— The price of. H. Farquhar. 523 
Simple form of a double image micrometer. 
G. M. Searle. 509 
Spectroscopic trains, Fixed. F. L. O. Wads¬ 
worth. 533 
Spectrum, Bolography of the infra-red. S. 
P. Langley... 538 
— Recent observations of the infra-red. S. 
P. Langley.. 524 
