INDEX 
371 
Harrison, G. R. The Absorption of 
Light by Sodium and Potassium 
Vapors, 260. 
Hearing, aids for the deaf (Wegel), 155. 
Hearing, sensitivity of (Fletcher and 
Wegel), 5; (MacKenzie), 188. 
Heaviside's theorem (I^orentz), 333. 
Hemoglobin concentration and cyanosis 
(Lundsgaard and Van Slyke), 280. 
Hesperopithecus (Osborn), 245. 
H11.L, A. J., see Johnson, T. B., 44. 
Hitchcock, F. L. A Solution of Linear 
Matrix Equation by Double Multi- 
plication, 78. 
Howard, L. O. A Side Line in the Im- 
portation of Insect Parasites of In- 
jurious Insects from One Country to 
Another, 133. 
Hydroquinol, oxidation of, with aliphatic 
amines (Harger), 57. 
Hypophyseal substance affecting growth 
(Evans and Long), 38. 
Igneous rocks, analysis of (Clarke and 
Washington), 108. 
Insects parasitic on others (Howard), 133. 
Insects, photic orientation (Mast), 240. 
Integrals, quantum (Epstein), 166. 
Invisible sun-spots (Hale), 168. 
Ionization at high temperatures (Noyes 
and Wilson), 303. 
Ionization in electric furnace (King), 
123. 
Ionization in mercury vapor (Eldridge), 
268. 
Ionization of potassium vapor (William- 
son), 255. 
Ionization potentials (Davis), 61. 
Jades of Middle America (Washington), 
319. 
Johnson, T. B., and Brown, E. B. 
The Isolation of Pyrimidines from 
the Nucleic Acid of Tubercle Bacillus, 
187. 
Johnson, T. B., Hii.Iv, A. J., and Case, 
F. H. The Action of Diazomethane 
on Uracil, 44. 
Joy, a. H., see Adams, W. S., 173. 
Jupiter, perturbations of minor planets 
(Leuschner), 170. 
Kidney excretion, as effected by Cucurbita 
Pepo seeds (Masurovsky), 39. 
King, A. S. Ionization and Absorption 
Effects in the Electric Furnace, 123. 
LeBIvANC, T. J., see Pearl, R., 300. 
Le;uschner, a. O. Comparison of Theory 
with Observation for the Minor 
Planets 10 Hygiea and 175 Androm- 
ache with Respect to Perturbations 
by Jupiter, 170. 
Light effects on argentite (Sheldon and 
Geiger), 161. 
Limbs, replantation of (Halsted), 181. 
Limits, generalized (Moore), 288. 
Lineal functional (Fischer), 26. 
Linear matrix equation (Hitchcock), 78. 
Long, J. A., see Evans, H. M., 38. 
LoRENTz, H. A. Proof of Theorem due 
to Heaviside, 333. 
LoTKA, A. J. Contribution to the Ener- 
getics of Evolution, 147, 
. Natural Selection as a Physical 
Principle, 151. 
. The Stability of the Normal Age 
Distribution, 339. 
Louisiade Archipelago (Davis), 7. 
Lundsgaard, C, and Van Slyke, D. D 
The Quantitative Influences of Cer- 
tain Factors Involved in the Produc- 
tion of Cyanosis, 280. 
McKeehan, L. W. The Crystal Structure 
of Beryllium and of Beryllium Oxide, 
270. 
— . The Crystal Structure of Potas- 
sium, 254. 
Mackenzie, D. The Relative-Sensi- 
tivity of the Ear at Different Levels 
of Loudness, 188. 
Magellanic cloud, distance of (Shapley), 
69. 
Man, antiquity of (Osborn and Reeds) 
246. 
Marshall, J. A. Bactericidal Prop- 
erties of the Products of Radium 
Emanation, 317. 
Mast, S. O. Photic Orientation in In- 
sects, 240. 
Masurovsky, B. A Study of the Effects 
of Cucurbita Seeds on Kidney Ex- 
cretion, 39. 
Matrix equations (Hitchcock), 78. 
Mazumder, K. C, see Duane, W., 45. 
Measurements, theory of (Shewhart), 
248. 
Mercury vapor, ionization of (Eldridge), 
268. 
Metallic conduction (Hall), 307. 
Metals, compressibility (Bridgman), 361. 
Mica, grating space (Davis and Terrill), 
59. 
Middle American Jades (Washington), 
319. 
Miller, G. A. Number of Substitutions 
Omitting at Least One Letter in a 
Transitive Group, 238. 
Miner, J. R. The Probable Error of 
the Vital Index of a Population, 
106. 
Minton, J. P. Some Cases of Nerve- 
Deafness and their Bearing on Res- 
onance Theories of Audition, 274. 
Moore, C. N. Generalized Limits in 
General Analysis, 288. 
