INDEX 
373 
Sensitivity of the ear (Fletcher and 
Wegel), 5; (MacKenzie), 188. 
Sensitivity of Telephones (Barus), 326. 
Shapley, H. Note on Problem of Great 
Stellar Distances, 69. 
SheivDon, H. H., and Geiger, P. H. 
The Production of an E. M. F. on 
Closed Circuit by a Light Effect on 
Argentite, 161. 
Shewhart, W. a. On the Measurement 
of a Physical Quantity Whose Magni- 
tude is Influenced by Primary Causes 
beyond the Control of the Observer 
and on the Method of Determining 
the Relation between Two Such 
Quantities, 248. 
Silica and chalcedony (Washburn and 
Navias), 1. 
Silurian life (Ruedemann), 54. 
SiNNOTT, E. W., see Blakeslee, A. F., 17. 
Skin, transplantation (Cole), 29. 
Sodium vapors, absorption by (Harrison), 
260. 
Solar radiation (Abbot, Fowle and Aid- 
rich), 177. 
Sound, reflection of (Barus), 66. 
Space, principal direction (Eisenhart), 
24; (Synge), 198, 204. 
Space curves (Moore), 33. 
Spaces with corresponding paths (Eisen- 
hart), 233. 
Spectra of explosion vapors (Anderson), 
231. 
Spectra of X-rays (Duane and Patterson), 
85. 
Stars, distance of (Adams and Joy), 
173. 
Stars, distribution of velocities (Strom- 
berg), 141. 
Stars, temperatures (Coblentz), 49, 330. 
Steering around a corner (Webster), 100. 
Stellar distances (Shapley), 69. 
Stromberg, G. On the Distribution of 
the Velocities of Stars of Late Types 
of Spectrum, 141. 
Substitution groups (Miller), 238. 
Sun-spots, invisible (Hale), 168. 
Synge, J. L. Principal Directions in a 
Riemannian Space, 198. 
. Principal Directions in the Ein- 
stein Solar Field, 204. 
Tadpoles, skin transplantation (Cole), 29. 
Telephones, relative sensitiveness (Barus), 
326. 
Temperature of stars (Coblentz), 49, 
330. 
TerriIvI., H. M., see Davis, B., 59. 
. See Davis, B., 357. 
Tetramitus (Bunting), 294. 
Time units in paleontology (Dachnowski), 
225. 
Transplantation of skin in tadpoles (Cole), 
29. 
Tubercle bacillus, pyrimidines from (John- 
son and Brown), 187. 
Tuberculosis and viscera (Pearl and Ba- 
con), 125. 
Uracil, as effected by diazomethane 
(Johnson, Hill and Case), 44. 
Vacuum gravitation needle (Barus), 13, 
63, 313, 327. 
Vacuum tubes (Nettleton), 353. 
Van Slyke, D. D., see Lundsgaard, C, 
280. 
VebIvEN, O. Normal Coordinates for 
the Geometry of Paths, 192. 
. Projective and Affine Geometry 
of Paths, 347. 
. See Eisenhart, L. P., 19. 
Velocity distribution for stars (Strom- 
berg), 141. 
Viscera in tuberculosis (Pearl and Bacon), 
125. 
Vital index (Pearl and Burger), 71; 
(Pearl), 76; (Miner), 106. 
Walsh, J. L. On the Location of the Roots 
of the Derivative of a Polynomial, 
139. 
Washburn, E. W\, see Navias, L., 1. 
Washington, H. S. The Jades of Middle 
America, 319. 
. See Clarke, F. W., 108. 
Webster, A. G. On Steering an Auto- 
mobile around a Corner, 100. 
Wegel, R. L. The Physical Examina- 
tion of Hearing and Binaural Aids 
for the Deaf, 155. 
. See Fletcher, H., 5. 
Williamson, R. C. Preliminary Report 
on the Ionization Vapor of Potassium 
by Light, 255. 
Wilson, H. A., see Noyes, A., 303. 
Wyman, L. C. The Effect of Ether 
upon the Migration of the Scale Pig- 
ment and the Retinal Pigment in the 
Fish, Fundulus Heteroclitus, 128. 
X-ray crystal analysis (Clark and Duane), 
90. 
X-ray spectra (Duane and Patterson), 85. 
X-rays, absorbed by aluminium and cop- 
per (Duane and Mazumder), 45. 
X-rays in calcite (Davis and Terrill), 357. 
