Datura, inheritance in (Blakeslee), 116.
Datura, mutant in (Blakeslee), 148.
Dempster, A. J. Positive Ray Analysis

of Magnesium, 45.

Diapason, energy content (Barus), 47.
DICKSON, L. E. Quaternions and Their
Generalizations, 109.

Diet, effect on growth (Osborne and Men-
del), 157.

Differential equations (Stouffer), 273;
(Hille), 303.

Differential invariants (Glenn), 276.
Differential thermometer (Menzies), 81.
Diffusion of air through water (Barus),
133.

Digestibility of flours (Langworthy and
Holmes), 119.

Drosophila, fourth chromosome (Bridges),
186.

Drosophila, mutant genes (Bridges), 127.
Drosophila, rearrangement of genes (Stur-
tevant), 235.

DUANE, W. On the Calculation of the
X-Ray Absorption Frequencies of
the Chemical Elements, 260.

On the Calculation of the X-Ray
Absorption Frequencies of the Chem-
ical Elements (Second Note), 267.
DUANE, W., PALMER, H. H., AND YEH,
CHI-SUN. A Remeasurement of the
Radiation Constant, h, by Means of
X-Rays, 237.

DUNCAN, J. C. Changes Observed in the
Crab Nebula in Taurus, 179.

FLEXNER, S., and AмOSS, H. L. A Physi-
cal Basis for Epidemiology, 319.
Flour, milling and digestibility (Lang-
worthy and Holmes), 119.
Fowls, egg production of (Harris et al.), 213
Fox, E. L., see Benedict, F. G., 154.
FULTON, J. F., Jr. Novocaine as a Sub-
stitute for Curare, 114.

Functional, average of (Wiener), 235, 294.

Gases in solutions (Van Slyke), 229.
Gelatin products (Van Slyke and Hiller),
185.

Genes in Drosophila (Bridges), 127;
(Sturtevant), 235.

Geodesy and geology (Bowie), 23.
Geologic conclusions from geodesy
(Bowie), 23.

Geometric systems (Bennett), 84.

Girls, basal metabolism (Benedict et al.),
10.

GLENN, O. E. An Algorism for Differ-
ential Invariant Theory, 276.
Globe, mutant in Datura (Blakeslee), 148.
Goodspeed, T. H., see Setchell, W. A., 50.
Gravitational theory (Eisenhart), 328.
Groups of order pq2 (Miller), 146.
Group theory (Miller), 325.
Growth curves (Reed), 311.
Growth on various diets (Osborne and
Mendel), 157.

GUERNSEY, S. J., see Kidder, A. V., 69.

h, measurement of (Duane et al.), 237.
HALL, E. H. The Peltier Effect, 62.

Thermo-Electric Action and Ther-
mal Conduction in Metals: A Sum-
mary, 98.

HARRIS, J. A., and SINNOTT, E. W. The
Vascular Anatomy of Normal and
Variant Seedlings of Phaseolus vul-
garis, 35.

HARRIS, J. A., KIRKPATRICK, W. F., and
BLAKESLEE, A. F. The Prediction
of Annual Egg Production from the
Records of Limited Periods, 213.
Hearing, sensitivity (Minton), 221.
Heat conduction (Hall), 98.
HENDRY, M. F., see Benedict, F. G., 10.
HILLE, E. An Integral Equality and Its
Applications, 303.

HILLER, A., see Van Slyke, D. D., 185.
HOLMES, A. D., see Langworthy, C. F.,
119.

HUNTINGTON, E. V. The Mathematical

Theory of the Apportionment of
Representatives, 123.

Hydrogen alloy, conductivity (Smith), 28.
Hydrolysis of gelatin (Van Slyke and
Hiller), 185.

Inheritance in Datura (Blakeslee), 116.
Inheritance in Drosophila (Bridges), 186;
(Lancefield and Metz), 225.

Inheritance in Trypanosoma (Taliaferro),
138, 163.

Integral equality (Hille), 303.

Integral solutions of equations (Blich-
feldt), 317.

Integrals in quantum theory (Kemble),
283.

Interferometric measurements of angles
(Michelson and Pease), 143; (Pease),
177.

Interferometry (Barus), 71.
Invariant theory (Glenn), 276.
Ionization theory (Kendall), 56.

Ionizing potential of metals (Millikan and
Barber), 13.

Ions, mobility of (Loeb), 5.
Isomorphisms (Miller), 325.
Isostasy (Bowie), 23.

IVES, H. E., see Arnold, H. D., 323.
JOHNSON, T. B., and BROWN, E. R.,

Studies on Catalysis. I. The Re-
duction of Uracil to Hydrouracil, 75.
KEMBLE, E. C. The Evaluation of
Quantum Integrals, 283.

KENDALL, J. The Correlation of Com-

pound Formation, Ionization and
Solubility in Solutions, Outline of a
Modified Ionization Theory, 56.
KIDDER, A. V., and GUERNSEY, S. J.

Peabody Museum Arizona Explor-
ation, 1920, 69.
KIRKPATRICK, W. F., see Harris, J. A., 213.

LAMER, V. K., see Sherman, H. C., 279.
LANCEFIELD, R. C., and METZ, C. W.

Non-Disjunction and the Chromo-
some Relationships of Drosophila
Willistoni, 225.

LANGWORTHY, C. F., and HOLMES, A. D.
The Effect of a Variation in Milling
on the Digestibility of Wheat Flours,
119.

LINDGREN, W.

Melanovanadite, A New
Mineral from Mina Ragra, Pasco
Peru, 249.

Linear equations (Blichfeldt), 317.
Linkage variation (Sturtevant), 181.
Liquids, viscosity (Phillips), 172.
LOEB, L. B. The Attachment of Elec-
trons to Neutral Molecules in Air, 5.
The Mobilities of Electrons, 307.
LOEB, L. B., and SCHMIEDESKAMP, L.
The Destruction of Phosphorescent
Zinc Sulfides by Ultra Violet Light,
202.

LOTKA, A. J. Note on Moving Equilibra,
168.

Note on the Economic Con-
version Factors of Energy, 192.

MCDONALD, J. H. On the Roots of
Bessel's Functions, 66.
Magnesium, positive rays (Dempster), 45.

Magnitudes in star clusters (Shapley and
Mayberry), 152.

Manometric interferometry (Parus), 71.
MAYBERRY, B. W., see Shapley, H., 152.
Melanovanadite (Lindgren), 249.

MENDEL, L. B., see Osborne, T. B., 157.
MENZIES, A. W. C. A Differential
Thermometer, 81.

MENZIES, A. C. W., and WRIGHT, S. L.
The Application of a Differential
Thermometer in Ebullioscopy, 77.
MERRIAM, J. C. Origin and History of
the Bear Family in the Western
Hemisphere, with Particular Refer-
ence to the Relation of This Question
to Problems of Geographical History,
183.
Messier 33, motion in (Van Maanen), 1.
Metabolism of girls (Eenedict et al.), 10.
Metals, conductivity (Hall), 98.
METZ, C. W., see Lancefield, R. C., 225.
MICHELSON, A. A., and PEASE, F. G.

Measurement of the Diameter of
Alpha-Orionis by the Interferometer,

143.
MILLER, G. A. An Overlooked Infinite
System of Groups of Order pq2, 146.

Group of Isomorphisms of a
Transitive Substitution Croup, 325.
MILLIKAN, R. A. The Further Extension
of the Ultra-violet Spectrum and the
Progression with Atomic Number
of the Spectra of Light Elements, 289.
MILLIKAN, R. A., and BARBER, I. F. On
the Reflection and Re emission of
Electrons from Metal Surfaces: and
a Method of Measuring the Ionizing
Potential of Such Surfaces, 13.
Milling, effect on digestibility (Lang-
worthy and Holmes), 119.

MINTON, J. P. Some Physical Character
istics of the Ear, 221.

Modular functions (Coble), 245, 334.
MORRIS, E. H. Chronology of the San
Juan Area, 18.

Moving equilibria (Lotka), 168.
Mutant in Datura (Blakeslee), 148.
Mutants in Drosophila (Sturtevant), 235.

NATIONAL ACADEMY OF SCIENCES, list
of publications, 339.
NATIONAL RESEARCH COUNCIL, list of
publications, 350.

Nebulae, motions in (Van Maanen), 1;
(Duncan), 179.

Nicotiana tabacum, crossing (Setchell et
al.), 50.

Non-disjunction in Drosophila (Bridges),

186; (Lancefield and Metz), 225.
Normalized geometric systems (Bennett),
84.
Novocaine for curare (Fulton), 114.
Number systems (Dickson), 109.

Ohm's law, deviations from (Bridgman),
299.

Origin of Proboscidea (Osborn), 231.
OSBORN, H. F. Adaptive Radiation and

Classification of the Proboscidea, 231.
OSBORNE, T. B., and MENDEL, L. B.
Feeding Experiments with Mixtures
of Foodstuffs in Unusual Proportions,
157.

Pachyderms, skin temperature (Benedict
et al.), 154.

PALMER, H. H., see Duane, W., 237.
Paramecium Aurelia (Woodruff), 41.
PEASE, F. G. The Angular Diameter of
Alpha Bootis by the Interferometer,
177.

See Michelson, A. A., 143.
Peltier effect (Hall), 62.

Phaseolus vulgaris, anatomy of (Harris
and Sinnott), 35.

PHILLIPS, H. B. A Formula for the
Viscosity of Liquids, 172.
Photo-thermionic currents (Arnold and
Ives), 323.

Phosphorescence destroyed by light (Loeb
and Schmiedeskamp), 202.
Planck's constant h (Duane et al.), 237.
Poisson's equation (Evans), 89.

Pore sizes in materials (Washburn), 115.
Positive ray analysis (Dempster), 45.
Potential theory (Evans), 89.
Pressures in acoustics (Barus), 207.
Prediction of egg production (Harris

SHAPLEY, H., and MAYBERRY, B. W.
Studies of Magnitudes in Star Clus-
ters. XIII. Variable Stars in N. G.
C., 7006, 152.
SHERMAN, H. C., LAMER, V. K., and
CAMPBELL, H. L. The Effect of
Temperature and of the Concentra-
tion of Hydrogen Ions upon the Rate
of Destruction of Antiscorbutic Vi-
tamin (Vitamin C), 279.

SINNOTT, E. W., see Harris, J. A., 35.
Skin temperature (Benedict et al.), 154.
Solubility (Kendall), 56.

Solutions, gases in (Van Slyke), 229.
Sound, energy of (Barus), 47.

Sound, pressures in (Barus), 207.
SMITH, D. P. Experiments on the Elec-
trical Conduction of a Hydrogen
Alloy, 28.

Spectra of light elements (Millikan), 289.
Spiral nebula, motion in (Van Maanen), 1.
Star clusters, magnitudes in (Shapley and
Mayberry), 152.

Stars, diameters of (Michelson and Pease),
143; (Pease), 177.

STOUFFER, E. B. Semi-covariants of a
General System of Linear Homo-
geneous Differential Equations, 273.
STURTEVANT, A. H. Linkage Variation
and Chromosome Maps, 181.

A Case of Rearrangement of Genes
in Drosophila, 235.

Swine, age and fertility (Ellinger), 134.
TALIAFERRO, W. H.

Variation and In-
heritance in Size in Trypanosoma
Lewisi, 138, 163.

Thermo-electricity (Hall), 62, 98.

Thermal conduction (Hall), 98.

Thermometer, differential (Menzies and
Wright), 77.

Trypanosoma, variation and inheritance
of size (Taliaferro), 138, 163.
Typhoid epidemics (Flexner and Amoss),
319.

Ultra violet light and phosphorescence
(Loeb and Schmiedeskamp), 202.
Ultra-violet spectrum (Millikan), 289.
Uracil and hydrouracil (Johnson and
Brown), 75.

Vanadium minerals (Lindgren), 249.
VAN MAANEN, A. Internal Motion in
the Spiral Nebula Messier 33, 1.
VAN SLYKE, D. D. An Apparatus for
Determination of the Gases in Blood
and Other Solutions, 229.
VAN SLYKE, D. D., and HILLER, A. An

Unidentified Base among the Hy-
drolytic Products of Gelatin, 185.
Variable stars (Shapley and Mayberry),
152.

Variation in Trypanosoma (Taliaferro),
138, 163.