766 
INDEX 
Seares, F. H. The Color of the Standard 
Polar Stars Determined by the Method 
of Exposure-Ratios, 29. 
. Photographic Magnitudes of Stars 
in the Selected Areas of Kapteyn, 188. 
. Preliminary Note on the Distribu- 
tion of Stars with Respect to the Galac- 
tic Plane, 217. 
. Further Evidence on the Concen- 
tration of the Stars Toward the Galaxy, 
558. 
Selection experiments with drosophila (Mac- 
Do well), 291. 
Sex determination and differentiation 
(Lillie), 464. 
Shapley, H. Studies of the Magnitudes in 
Star Clusters, IV. On the Color of 
Stars in the Galactic Clouds Surround- 
ing Messier, 11, 25. 
. see Pease, F. G., 96. 
. Studies of Magnitudes in Star Clus- 
ters, V. Further Evidence of the Ab- 
sence of Scattering of Light in Space, 
267. 
. Studies of Magnitudes in Star Clus- 
ters, VI. The Relation of Blue Stars 
and Variables to Galactic Planes, 276. 
. Studies of Magnitude in Star Clus- 
ters, VII. A Method for the Deter- 
mination of the Relative Distances of 
Globular Clusters, 479. 
Shell-shock in fishes and marine inverte- 
brates (Mayer), 597. 
Shields, M. C. A Determination of the 
Ratio of the Specific Heats of Hydrogen 
at 18° and -190°C., 502. 
Silver voltameter as an international standard 
for the measurement of electric current 
(Rosa and Vinal), 59. 
Small angles by displacement interfero- 
metry (Barus), 412. 
Smith, E. F. Chemically induced Crown- 
galls, 312. 
Solar motion, apex of (Perrine), 38. 
Solutions, ionization in (Washburn), 569. 
Southern Celebes, petrography of (Iddings 
and Morley), 592. 
Specific heats of hydrogen at 18° and — 190°C. 
(Shields), 502. 
Spectra, direct and reversed superposed 
(Barus), 665. 
Spectra of isotopes (Harkins and Aron- 
berg), 710. 
Spectral-class and proper motion (Perrine), 
491. 
Spier, L. Zuni Chronology, 280. 
Sporophytes of Anthoceros (Campbell), 494. 
Star clusters, magnitudes in (Shapley), 25, 
267, 276, 479. 
Stark effect in helium and neon (Nyquist), 
399. 
Stars, concentration toward the Galaxy 
(Seares), 558. 
Stars, distribution of ^ (Seares), 217. 
Starvation of cassiopea Xamachana (Hatai), 
22. 
Steenbock, H., see Hart, E. B., 374. 
Stellar magnitudes in Kapteyn's selected 
areas (Seares), 188. 
Stellar motion, principal axes of (Raymond), 
485. 
Stewart, T. D., see Tohnan, R. C, 58. 
Stieltjes integrals (Bliss), 633. 
Stringer, C. E. The Means of Locomo- 
tion in Planarians, 691. 
Sturm-Liouville series (Birkhoff), 655. 
Sturtevant, a. H. Genetic Factors Af- 
fecting the Strength of Linkage in 
Drosophilia, 555. 
Sublacustrine glacial erosion in Montana 
(Davis), 696. 
Subsoil, water in (Alway and McDole), 257. 
Sulphides, phosphorescence of (Nichols), 
199. 
Sulphur, sulphur dioxide, carbon monoxide 
and dioxide (Ferguson), 371. 
Surface, natural and isogonal families of 
curves on (Lipka), 78. 
Surfaces and rectilinear congruences (Green), 
587. 
Surfaces, curves on (Eisenhart), 637. 
Taber, S. Pressure Phenomena Accom- 
panying the Growth of Crystals, 297. 
Temperature effect on linkage in Droso- 
phila (Plough), 553. 
Temperature optima for human energy 
(Huntington), ^ 127. 
Temperature rise in combustion (Richards 
and Davis), 53. 
Terracing of Bajada belts (Keyes), 33. 
Tetany, thymus in the production of (Uhlen- 
huth), 517. 
Thomson, E. Inferences concerning Auro- 
ras, 1, 222. 
Thymus in the production of tetany (Uhlen- 
huth), 517. 
TiCKNOR, A. A., see Johnson, T. B., 303. 
ToLMAN, R. C, and Stewart, T. D. The 
Mass of the Electric Carrier in Copper, 
Silver and Aluminium, 58. 
Toluene, heat of combustion (Richards and 
Davis), 50. 
Tortugas, changes in the sea (McClendon), 
692. 
Tortugas sea water (McClendon), 612. 
Transplantation of limbs (Harrison), 245. 
Triad systems (Cole, Cummings, and White), 
197. 
Triaryhnethyls, molecular weights of (Gom- 
berg and Schoepfle), 457. 
Triplet series of radium (Anslow and Howell) 
409. 
Turtle embryo, primordial germ cells in 
(Jordan), 271. 
Uhlenhuth, E . On the Role of the Thymus 
in the Production of Tetany, 517. 
UiiLER, H. S. On Moseley's Law for X- 
Ray Spectra, 88. 
Underhill, F. p., see Chittenden, R. H., 
195. 
