INDEX 
611 
Heterogeneous equilibrium (Harkins), 152. 
Holland, R. H., see Reed, H. S., 135. 
Horns, theory of (Webster), 275. 
HuRD, A. M. Orienting Effects of Mono- 
chromatic Lights of Equal Intensities 
of Fucus Spores and Rhizoids, 201. 
Hydrogen overvoltage (MacInnes and Ad- 
ler), 160; (MacInnes and Contieri), 321. 
Hydrogen, ozone form (Wendt), 518. 
Hypersurfaces (Lefschetz), 296. 
Indeterminate equations (Lehmer), 111. 
Interferometry, see Barus, C. 
International Astronomical Union, 193. 
Ionization by a-rays (Millikan et al.), 591. 
Isotonic lead (Duane and Shimizu), 198; 
(Bridgman), 351. 
Johnson, A., see Benedict, F. G., 218. 
Joy, a. H., see Adams, W. S., 239. 
Kelly, M. J., see Millikan, R. A., 591. 
Kinetics of liquids (Harkins), 152. 
KoFOiD, C. A. and Swezy, O. Flagellate 
Affinities of Trichonympha, 9. 
Langmuir, I. Structure of Atoms and the 
Octet Theory of Valence, 252. 
Langworthy, C. F. and Deuel, H. J. 
Effect of Milling on the Digestibility 
of Graham Flour, 514. 
Lead, electrical properties (Bridgman), 351. 
Lead isotopes (Duane and Shimizu), 198. 
Lefschetz, S. Real Folds of Abelian Va- 
rieties, 103. 
. Real Hypersurfaces contained in 
Abelian Varieties, 296. 
Lehmer, D. N. General Solution of the 
Indeterminate Equation: Ax By -\- 
Cz-h- - = r, 111. 
Lemon, H. B. Variations, due to Heat 
Treatment, in the Rate of Absorption 
of Air by Cocoanut Shell Charcoal, 291. 
Lemon, H. B. and Blodgett, K. Relative 
Adsorption of Mixtures of Oxygen and 
Nitrogen in Cocoanut Shell Charcoal, 
289. 
Leuschner, a. O. Perturbations and 
Tables of the Minor Planets, 67. 
Liquids, specific heat (Barus), 340. 
Liquids, structure of (Harkins), 152. 
Lithosphere, structure of (Willis), 377. 
Lobster shells (Clarke and Steiger), 6. 
LoEB, J. Influence of Ions on the Electri- 
fication and Rate of Diffusion of Water 
through Membranes, 440. 
Love, A. G. and Davenport, C. B. Com- 
parison of White and Colored Troops 
in respect to Incidence of Disease, 58. 
LusK, G., see Atkinson, H. V., 246. 
Lymphatico-venous fistulae (Halsted), 76. 
MacInnes, D. A. and Adler, L. Hydro- 
gen Overvoltage, 160. 
MacInnes, D. A. and Contieri, A. W. 
Applications of Variation of Hydrogen 
Overvoltage with the Pressure, 321. 
Magnetic field of Sun (Seares, Van Maanen 
and Ellerman), 242. 
Magnetization and elongation (Barus), 267. 
Magneton, radiation from (Bateman), 367. 
Magnitudes in star clusters (Shapley), 344, 
434. 
Medals awarded by the Academy, 492. 
Meltzer, S. J., and Wollstein, M. Influ- 
ence of Degeneration of One Vagus 
Nerve upon the Development of Pneu- 
monia, 493. 
Menzies, a. W. C. New Measurements 
of the Vapor Pressure of Mercury, 558. 
Mercury, vapor pressures (Menzies), 558. 
Merrill, G. P. Meteorite Falls and Finds 
considered with reference to their vary- 
ing basicity, 37. 
Merwin, H. E., see Ferguson, J. B., 16. 
Meteorite falls and finds, (Merrill) 37. 
Miles, W. R., see Benedict, F. G., 218. 
Milk production in cattle (Castle), 428. 
Miller, G. A. Groups involving only two 
Operators which are Squares, 272. 
Millikan, R. A., Gottschalk, V. A. and 
Kelly, M. J. Effect upon the Atom 
of the Passage of an Alpha Ray through 
it, 591. 
Molecular energy (Harkins), 539, 562. 
Moore, R. L. Most General Class L of 
Frechet in which the Heine-Borel- 
Lebesgue Theorem holds true, 206. 
Morgan, T. H., see Sturtevant, A. H,, 168. 
Moropus (Osborn), 250. 
Mortality, embryological basis (Pearl), 
593. 
National Academy of Sciences. Report 
of the Autumn Meeting, 87. 
. Report of the Annual Meeting, 479. 
. Award of Medals, 492. 
. Research Grants from the Trust 
Funds of the Academy, 492. 
National Research Council. Meetings 
of Executive Board, 50, 91, 299, 360, 
462, 532, 603. 
. Meetings of the Executive Board 
with Council of the National Academy 
of Sciences, 180, 354, 452, 523. 
. Meetings of Interim Committee, 447, 
459, 469, 528, 599. 
. Meetings of International Research 
Council and of Affiliated Organizations 
at Brussels, beginning July 18, 1919, 473. 
, National Research Fellowships in 
Physics and Chemistry, 313. 
, Organization of, 184. 
, Organization of Division of Physical 
Sciences, 316. 
Nelson, N. C. Archaeology of the South- 
west: A Preliminary Report, 114. 
Nerve plexuses and peripheral neurones 
(Detwiler), 324. 
Nervous organization of a Nudibranch 
(Crozier and Arey), 498. 
Nicholson, S. B., see Shapley, H., 417. 
