INDEX 
423 
Northeastern America, glaciation (Fair- 
child), 229. 
Notice of Biographical Memoirs, John Shaw 
Billings, 54. 
Novae, absorption spectrum of (Adams), 
354. 
Number, resolved into sum of squares 
(Hardy), 189. 
Onchidium, homing habits of (Arey and 
Crozier), 319. 
Optical surfaces, the correction of (Michel- 
son), 210. 
Osterhout, W. J. V., and Haas, A. R. C. 
Dynamical Aspects of Photosynthesis, 
85. 
Page, L. Is a Moving Star Retarded by 
the Reaction of Its Own Radiation? 47. 
Parker, G. H. The Growth of the Alas- 
kan Fur Seal Herd between 1912 and 
1917, 168. 
Parthenogenetic frogs, sex of (Loeb), 60. 
Payne, F. The Effect of Artificial Selec- 
tion on Bristlfe Number in Drosophila 
Ampelophila and its Interpretation, 55. 
Pease, F. G. The Rotation and Radial 
Velocity of the Central Part of the 
Andromeda Nebula, 21. 
Pendulum, curves described by spherical 
(Emch), 218. 
Perrine, C. D. Dependence of the Spec- 
tral Relation of Double Stars upon 
Distance, 71. 
. Hypothesis to Account for the 
Spectral Conditions of the Stars, 75. 
Petrography of the South Sea Islands (Id- 
dings and Morley), 110. 
Philippine Islands, fringing reefs of (Davis), 
197. 
Phosphorescence, types of (Nichols and 
Howes), 305. 
Photosynthesis, dynamical aspects of (Os- 
terhout and Haas), 85. 
Phyllopods as possible derivation of the 
Lepadid barnacles (Clarke), 384. 
Phylogeny of the acorn barnacles (Ruede- 
mann), 382. 
Planetary nebulae, distances of (van 
Maanen), 394. 
Polyclads, method of progression in (Cro- 
zier), 379. 
Potassium, resonance potentials for elec- 
trons (Tate and Foote), 9. 
Potential differences induced by earth's 
magnetic field in an insulated moving 
wire (Barus and Barus), 66. 
Potentials, resonance and ionization for 
electrons in metallic vapors (Tate and 
Foote), 9. 
Progression in Polyclads (Crozier), 379. 
Projective generalizations of metric theo- 
rems (Green), 346. 
Purification by sublimation and analysis of 
gallium chloride (Richards, Craig, and 
Sameshima), 387. 
Purification of gallium by electrolysis, and 
its compressibility and density (Rich- 
ards and Boyer), 388. 
P-V-plane, thermo-electric diagrams on 
(Hall), 297. 
Radial velocities, solar motion based on 
(Stromberg), 36. 
Radiation, is a moving star retarded by 
reaction of? (Page), 47. 
Rat, growth changes in nervous system of 
(Donaldson), 280. 
Reduction in diet as affecting neuro-mus- 
cular processes and mental condition 
(Miles), 152. 
Reduction in diet, effects of on twenty-five 
men (Benedict, and Roth), 149. 
Reduction in diet, influence on efficiency 
during muscular work (Smith), 157. 
Reefs, fringing the Philippine Islands 
(Davis), 197. 
Refractive index and solubilities of nitrates 
of lead isotopes (Richards and Schumb), 
386. 
Regeneration, law controlling rate of 
(Loeb), 117. 
Relativity and electro-magnetic induction 
(Barnett), 49. 
Relativity and reaction to radiation (Page), 
47; (Larmor), 334. 
Report of annual meeting, 261. 
Research Grants by the Academy, 273. 
Research Information Committee (N. R. 
C), 124. 
Resistance to disease in cabbage (Jones), 
42. 
Resonance and ionization potentials for 
electrons in vapors (Tate and Foote), 9. 
Richards, T. W., and Boyer, S. The Puri- 
fication of Gallium by Electrolysis, and 
the Compressibility and Density of 
Gallium, 388. 
Richards, T. W., Craig, W. M., and Same- 
shima, J. The Purification by Subli- 
mation and the Analysis of Gallium 
Chloride, 387. 
Richards, T. W., and Schumb, W. C. Re- 
fractive Index and Solubilities of the 
Nitrates of Lead Isotopes, 386. 
Rodebush, W. H., see Lewis, G. N., 25. 
Roth, P., see Benedict, F. G., 149. 
Ruedemann, R. The Phylogeny of the 
Acorn Barnacles, 382. 
Seal herd, Alaskan, growth of (Parker), 168. 
Seares, F. H., van Maanen, A., and 
Ellerman, F. The Location of the 
Sun's Magnetic Axis, 4. 
Sameshima, J., see Richards, T. W., 387. 
Samoan coral reefs, growth-rate of (Mayor), 
390. 
Schumb, W. C, see Richards, T. W., 386. 
Sediments, study of as an aid to the earth 
historian (Blackwelder), 163. 
Selection, effect on bristle number in Droso- 
phila (Payne), 55. 
