420 
INDEX 
Bridges, C. B. Maroon — A Recurrent 
Mutation in Drosophila, 316 
Bristle number in Drosophila, effect of selec- 
tion on (Payne), 55. 
Cabbage, disease resistance in (Jones), 42. 
Cadmium, resonance potentials for elec- 
trons (Tate and Foote), 9. 
Cattlf, basal katabolism of (Armsby, Fries, 
and Braman), 1. 
Cepheid variables, spectral characteristics 
of (Adams and Joy), 129. 
Chiton tuberculatus, growth and duration 
of life (Crozier), 322. 
Chiton tuberculatus growth in different 
environments, (Crozier), 325. 
Cladocera, sex and sex intergrades in 
(Banta), 373. 
Clarke, F. W. Notes on Isotopic Lead, 
181. 
Clarke, J. M. Possible Derivation of the 
Lepadid Barnacles from the Phyllopods; 
384. 
Cluster hypothesis in ionization (Yen), 91, 
106. 
Clusters, magnitudes in star (Shapley), 224. 
Cobb, P. H. Autonomous Responses of the 
Labial Palps of Anodonta, 234. 
Compressibility of gallium (Richards and 
Boyer), 388. 
Conduction of electricity, thermo-electric 
action (Hall), 98, 297. 
Continued fractions (Lehmer), 214. 
Coral reefs (Davis), 197. 
Coral reefs, Samoan, (Mayor), 390. 
Craig, W. M., see Richards, T. W., 387, 
Cross breeding, effect on development 
(Jones), 246. 
Crozier, W. J. Growth and Duration of 
Life of Chiton Tuberculatus, 322. 
. Growth of Chiton Tuberculatus in 
Different Environments, 325. 
. On the Method of Progression in 
Polyclads, 379. 
Crozier, W. J., see Arey, L. B., 319. 
Crystal penetration, depth of X-ray (Blake), 
236. 
Crystal structure of ice (St. John), 193. 
Curves described bv spherical pendulum 
(Emch), 218. 
Davenfort, C. B. Hereditary Tendency 
to Form Nerve Tumors, 213. 
Davis, W. M. Fringing Reefs of the Philip- 
pine Islands, 197. 
. Metalliferous Laterite in New 
Caledonia, 275. 
Density of gallium (Richards and Boyer) 
388. 
Dershem, E. The Resolving Powers ( of 
X-Ray Spectrometers and the Tung- 
sten X-Ray Spectrum, 62. 
Dilation of great arteries, (Halsted), 204. 
Disease resistance in cabbage (Jones), 42. 
Distances of six planetary nebulae (van 
Maanen), 394. 
Donaldson, H. H. A Comparison of 
Growth Changes in the Nervous Sys- 
tem of the Rat with Corresponding 
Changes in the Nervous System of 
Man, 280. 
Doolittle, E. A Study of the Motions of 
Forty-Eight Double Stars, 137. 
Double stars, motions of (Doolittle), 137. 
Double stars, spectral relations of (Perrine), 
71, 75. 
Drechsler, C. The Taxonomic Position 
of the Genus Actinomyces, 221. 
Drosophila ampelophila, effect of artificial 
selection on bristle number (Payne), 
Drosophila, recurrent mutation in (Bridges), 
316. 
Dynamical aspects of photosynthesis -(Os- 
terhout and Haas), 85. 
Earth history, sedimentation as an aid to 
(Blackwelder), 163. 
Eastman, E. D., see Lewis, G. N., 25. 
Ekblaw, W. E. The Importance of Niva- 
tion as an Erosive Factor, and of 
Soil Flow as a Transporting Agency, in 
Northern Greenland, 288. 
Electricity, thermo-electric action with 
dual conduction of (Hall), 98, 297. 
Electrolysis of gallium (Richards and Boyer) , 
388. 
Electromagnetic field, structure of (Bate- 
man), 140. 
Electromagnetic induction and relative 
motion, II. (Barnett), 49. 
Electrons, resonance potentials for in vapors 
(Tate and Foote), 9. 
Electrons, thermal energy of (Lewis, East- 
man and Rodebush), 25. 
Electro-positive metals, heat capacity of 
(Lewis, Eastman, and Rodebush), 25. 
Elements, structure of chemical (Clarke), 
181. 
Ellerman, F., see Seares, F. H., 4. 
Emch, A. On Closed Curves Described by 
a Spherical Pendulum, 218. 
Erosion, importance of nivation for 
(Ekblaw), 288. 
Executive Order relative to National Re- 
search Council, 251. 
Fairchild, H. L. Glacial Depression and 
Post-Glacial Uplift of Northeastern 
America, 229. 
Fishes, myodome and trigemino-facialis 
(Allis), 241. 
Fluorine and tin, tests for in meteorites 
(Merrill), 176. 
Foote, P. D., see Tate, J. T., 9. 
Forms, invariants and canonical (Wil- 
czynski), 300. 
Forms, invariants of (Glenn), 145. 
Fractions, certain Hurwitzian continued 
(Lehmer), 214. 
Fries, J. A., see Armsby, H. P., 1. 
