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Number 6. Data relating to X-ray spectra. By WILLIAM DUANE. November, 1920. Pages 26. Price 50 cents.

Number 7. Intensity of emission of X-rays and their reflection from crystals. By BERGEN DAVIS. Problems of X-ray emission. By DAVID L. WEBSTER. December, 1920. Pages 47. Price 60 cents.

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Number 9.

VOLUME 2

Funds available in 1920 in the United States of America for the encouragement of scientific research. Compiled by CALLIE HULL. March, 1921. Pages 81. Price $1.00.

Number 10. Report on photo-electricity including ionizing and radiating potentials and related effects. By ARTHUR Llewelyn HUGHES. April, 1921. Pages 87. Price $1.00.

Number 11. The scale of the universe.

Part I by HARLOW SHAPLEY. Part II by

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Number 13. The research activities of departments of the state government of California in relation to the movement for reorganization. By James R. Douglas. June, 1921. Pages 46. Price 60 cents.

Number 14. A general survey of the present status of the atomic structure problem. Report of the Committee on Atomic Structure of the National Research Council. By DAVID L. WEBSTER and LEIGH PAGE. July, 1921. Pages 61. Price 75 cents.

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Number 1. Report of the Patent Committee of the National Research Council. Presented for the Committee by L. H. BAEKELAND, Acting Chairman. February, 1919. Pages 24. Price 30 cents.

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Number 5. Some problems of sidereal astronomy. By HENRY N. Russell. October, 1919. Pages 26. Price 30 cents.

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Number 23. American research chemicals. By Clarence J. West. September, 1921. Pages 28. Price 50 cents.

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BAKER, M. L., see Benedict, F. G., 10,
154.

BARBER, I. G., see Millikan, R. A., 13.
BARUS, C. The Energy Content of the
Diapason, 47.

The Open Mercury Manometer
Read by Displacement Interfer-
ometry, 17.

The Diffusion of Air through
Water in the Lapse of Years. 133.

Acoustic Pressure Distributions,
Chiefly in Reservoirs and in Pipes,
207.

The U-Tube Absolute Electrom-
eter, 242.

Bears in America (Merriam), 183.
BELLING, J. The Behavior of Homol-

ogous Chromosomes in a Triploid
Cana, 197.

BENEDICT, F. G., Fox, E. L., AND BAKER,
M. L. The Skin Temperature of
Pachyderms, 154.

BENEDICT, F. G., HENDRY, M. F., AND

BAKER, M. L. The Basal Metab-
olism of Girls 12 to 17 Years of Age,
10.

BENNETT, A. A. Normalized Geometric
Systems, 84.

Bessel's functions (McDonald), 66.

Betelguese, diameter of (Michelson and
Pease), 143.

Blakeslee, A. F. An Apparent Case of
Non-Mendelian Inheritance in Da-
tura Due to a Disease, 116.

The Globe, a Simple Trisomic
Mutant in Datura, 148.

See Harris, J. A., 213.

BLICHFELDT, H. F. On the Approximate
Solutions in Integers of a Set of
Linear Equations, 317.

BOWIE, W. Some Geologic Conclusions
from Geodetic Data, 23.

BRIDGES, C. B. Current Maps of the
Location of the Mutant Genes of
Drosophila Melanogaster, 127.

Genetical and Cytological Proof
of Non-Disjunction of the Fourth
Chromosome of Drosophila Melano-
gaster, 186.
BRIDGMAN, P. W.

Measurements of the
Deviation from Ohm's Law in Metals
at High Current Densities, 299.
BROWN, E. B., see Johnson, T. B., 75.
Brownian motions (Wiener), 294.

CAMPBELL, H. L., see Sherman, H. C., 279.
Canna, chromosome behavior (Belling),
197.

Catalysis (Johnson and Brown), 75.
Chromosome maps (Sturtevant), 181.
Chromosome maps of Drosophila
(Bridges), 127.

Chromosomes of Drosophila (Lancefield
and Metz), 225.

Chromosomes in cannas (Belling), 197.
Chronology of San Juan (Morris), 18.
CLAUSEN, R. E., see Setchell, W. A., 50.
COBLE, A. B. Geometric Aspects of the
Abelian Modular Functions of Genus
Four (I), 245.

Geometric Aspects of the Abelian
Modular Functions of Genus Four
(II), 334.

Compound formation in solutions (Ken-
dall), 56.

Conduction at high current density
(Bridgman), 299.

Conduction of hydrogen alloy (Smith), 28.
Conversion factors of energy (Lotka), 192.
Copper, ionizing potential (Millikan and
Barber), 13.

Crab nebula (Duncan), 179.

Crossing of Nicotiana tabacum (Setchell
et al.), 50.

Curve fitting (Reed), 311.

363

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 YɛH,
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.

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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.

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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. B.,

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 (Barus), 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 (Benedict 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 Group, 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.

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