INDEX 
Page. 
Abbe, C.: Account of the eclipse expedition 
to Africa. 555 
— Influence of forests upon rainfall. 521 
— Mechanical conditions of the earth’s 
mass. 533 
— Meteorology in Europe and America. 569 
Address of President Dutton, 1890 [1891]. 359 
-President Eastman, 1889. 143 
-President Mallery, 1888. 1 
Africa, Stanley’s discoveries in. G. G. Hub¬ 
bard. 551 
Agricultural Department, Scientific work of. 
E. Willits. 550 
— experiment stations, Status and tenden¬ 
cies of. A. C. True. 566 
Aldis, A. O., Death of. 569 
Alloys, Formation of. W. Halloek. 505 
Anatomy, Comparative, of the simian and 
human brain. B. G. Wilder. 553 
Annual Meeting, 1888 . 522 
-1889. 543 
-1890. 557 
- 1891. 572 
Arid region of North America, Subaerial de¬ 
posits of. I. C. Russell - .531 
Arkansas, Neozoic formations in. R. T. Hill. 501 
Astronomy, Meteoric, Progress of, in Amer¬ 
ica. J. R. Eastman.. 275 
— Spherical, Problem in. A. Hall. 601 
— Tisserand’s Trait6 de mecanique celeste. 
R. S. Woodward. 568 
Atkinson, W. R., elected member. 555 
Atlantic and Gulf coasts, Recent geographic 
changes on. W J McGee... 554 
Atomic weights, Determination of. F. W. 
Clarke. 506 
Atwater, W. O., elected member. 540 
— American and European food consump¬ 
tion . 53Q 
Auditing committee, Report on Treasurer’s 
accounts for 1887. 499 
—’-1888.. 528 
- 1889. 649 
- 1890. 563 
Averages. M. Baker. 591 
— Notes on problems in. R. S. Woodward.. 605 
— and means. M. H. Doolittle. 596 
Page. 
Azimuth observations for the detection of 
variations in the pole or vertical. J. F. 
Hayford....... 572 
Bacteriology in applied entomology. C. V. 
Riley. 565 
Baker, F., elected member. 554 
— Work of the life-saving crews during the 
recent hurricane. 542 
Baker, M.: Averages. 591 
— Obituary notice of E. B.'Lefavour. 488 
— Published writings of E. B. Elliott. 608 
— Report of the Secretaries, 1888 . 523 
Balloon voyages, Two. H. A. Hazen. 511 
Bancroft, G., Death of... 564 
Bates, H. H.: Force. 5S7 
— Increasing industrial employment of the 
rarer metals. 503 
Bauer, L. A., elected member. 518 
Becker, G. F.: Rounding of rock masses by 
external attack. 500 
Belgium, National postal and savings bank 
system of. T. Wilson. 570 
Bernardinite. J. Stanley-Brown. 567 
Bessels, E., Death of.. 515 
— Obituary notice of, by W. H. Dali. 465 
Bigelow, F. H.: Experiments for eliminat¬ 
ing the error of personal equation from 
stellar transits by photography. 570 
— Suggestions on eclipse photography and 
eclipse apparatus. 555 
Billings, J. S.: Galton’s apparatus for testing 
muscular sense. 502 
Biological survey of the San Francisco moun¬ 
tain range of Arizona. C. H. Merriaip ... 551 
Birds, Soaring of. G. K. Gilbert. 522 
Black Hills, Pre-Cambrian rocks of the. C. 
R. Van Hise. 552 
Boutelle, C O.: Geodetic azimuths. 513 
— Obituary notice of H. F. Walling...^. 492 
— Death of. 554 
— Obituary notice of, by E. Goodfellow. 466 
Braid, A., elected member. 506 
Brain, Comparative anatomy of the simian 
and human. B. G. Wilder .. 553 
British Columbia, Explorations in. G. M. 
Dawson.*. 502 
( 611 ) 
