INDEX TO VOLUME 13 
A { denotes the abstract of a paper presented before the Academy or an affiliated Society. A § indicates 
an item published under the head Scientific Notes and News. 
PROCEEDINGS OF THE ACADEMY AND AFFILIATED SOCIETIES 
Biological Society of Washington. 
Botanical Society of Washington. 
Chemical Society of Washington. 
Entomological Society of Washington. 
Proceedings: 110, 234, 372. 
Proceedings: 113, 187, 411, 451. 
Proceedings: 163. 
Proceedings: 159, 258, 374. 
Philosophical Society of Washington. Proceedings: 43, 65, 91, 138, 215, 333. 
Washington Academy of Sciences. 
Proceedings: 13, 294, 443. 
AUTHOR INDEX 
Apams, L. H. Density distribution in 
the Earth. 413. 
AxsricHt, Horace M. 7{Yellowstone Na- 
tional Park, protecting wild life in. 
235. 
AupricH, J. M. Insect distribution, Ca- 
nadian life zone as indicated by. 237. 
—— tWilliston, 8. W., manuscript auto- 
biography of. 259. 
Aston, F. W. jIsotopes and the structure 
of the atom. 13. 
Autt, J. P. tAir navigation. 334. 
AvrRoussEAU, M. Silica, residue from, in 
rock analysis. 330. 
Bautpwin, S. Prentiss. tBird banding, 
new method of bird study. 373. 
Batu, E. D.. {Training for biological 
work in Government service. 110. 
BeatTti£, J. H. {Sweet potato nomen- 
clature. 239. 
Bennett, A: H. {Photographic lenses, 
aberrations of anastigmatic. 91. 
Bernton, H. 8. tHay fever, biological 
aspects of. 236. 
Berry, Epwarp W. Lower Cretaceous 
of Alabama, age of the supposed. 433. 
Buaks, 8. F. Cyathomone, new genus 
[Composite]. 105. 
— Ericentrodea, new genus [Com- 
posite]. 104. 
— Narvalina, new genera related to. 
102. 
—— Rensonia, new genus of Composite. 
144. 
Salvador, new Composites from. 
143. 
Bovine, A. S. 
OL ne L622 
Bowen, N. L. Melilite, genesis of. 1. 
Bowigr, Wiiu1aAmM. {International Geo- 
detic and Geophysical Union and 
International Astronomical Union, 
meetings of. 43. 
— TIsostatie investigations, 
progress in. 267. 
BRIDWELL, J. C. {Bruchus bixal, habits 
of. 261. 
+Chaleid, clover-seed, in seeds of 
Astragalus. 260. 
{Eurytoma rhois, retarded develop- 
ment in. 262. 
{Rhagoletis suavis, walnut hull mag- 
got, pupae living two years. 262. 
Briaes, L. J. tAir speed in wind-tunnels, 
direct measurement of. 93. 
Britton, N.L. Rubiaceae, new plants of, 
from Trinidad. 105. 
Cuase, Acnss. Identification of Raddi’s 
7Blister-beetles, biology 
recent 
grasses. 167. 
—— jTypes of plants in European 
herbaria. 373. 
CuarK, Austin H. Annacrinus, new 
genus of Pentacrinidae. 11. 
—— Pentacrinidae, revision of recent. 8. 
— Saracrinus, new genus of Penta- 
crinidae. 8. 
— Vertebrates, origin of. 129. 
457 
