*Anorthosites, problem of. N. L.
BOWEN. 205.

*Chemical analyses of igneous rocks
from 1884 to 1913. H. S. WASH-
INGTON. 66.

Glass-making processes; their sig-
nificance to the petrologist. N.
L. BOWEN. 88.

§Petrologists' Club of Washington,

review of its work. R. B. Sos-
MAN. 261.

Physical Chemistry. *Gas interferom-
eter calibration. J. D. EDWARDS.
248.

†Lead oxides, polymorphism of.
H. E. MERWIN and L. H. ADAMS.
75.

†Phase rule, quantitative applica-
tions of. G. W. MOREY and E. D.
WILLIAMSON. 75.

Physics. Actinium emanation, diffu-
sion of and recoil from. L. W.
MCKEEHAN. 74.

Ammonia, latent and specific heats
of. N. S. OSBORNE and M. S.
VAN DUSEN. 103.

Ammeter, an optical. P. D. FOOTE.
77.

†Anemometer, Robinson's, a simpli-

fied form of. B. C. KADEL. 255.
Barometric ripples. W. J. HUM-
PHREYS. 182.

†Compressibilities of solids under
hydrostatic pressure, measur-
ment of. E. D. WILLIAMSON and
L. H. ADAMS. 102.

*Color standards and methods of
color nomenclature. I. G. PRIEST.
247.

†Colors, complementary, and the
properties of pigments. H. E.
MERWIN. 254.

†Daylight, artificial, precision
method for producing. I. G.
PRIEST. 254.
†Direct-current corona, experiments
on. S. J. CROOKER. 73.
Earth-current measurements, pres-
sure and temperature effects in.
S. J. MAUCHLY. 371.
†Electrical measurements at radio
frequencies. J. H. DELLINGER.

293.

Electron, size and shape of. A. H.
COMPTON. 1.
Electrons, critical potentials for,
in metallic vapors. J. T. TATE
and P. D. FOOTE. 73.
†Gas iron, constitution of the. A.
Q. TOOL. 506.
tIonization and resonance poten-
tials for electrons in vapors of
magnesium and thallium. P. D.
FOOTE and F. L. MOHLER. 373.
*Latent heat of pressure variation
of liquid ammonia. N. S. Os-
BORNE and M. S. VAN DUSEN.
201.

*Latent heat of vaporization of
ammonia. N. S. OSBORNE and
M. S. VAN DUSEN. 202.
Mercury still, of silica glass. J. C.
HOSTETTER and R. B. SOSMAN.

11.

Periodic system of the elements.
P. V. WELLS. 232.
*Photo-electric cell and other selec--
tive radiometers. W. W. COB-
LENTZ. 536.

*Photoelectric sensitivity of bis-
muthinite and other substances.
W. W. COBLENTZ. 574.
†Planck's law, determination of the
constant C2. C. E. MENDEN-
HALL. 292.

*Radio instruments and measure-
ments (Bur. Stand. Circ. No. 74).
368.

Radium luminous materials. N.
E. DORSEY. 74.

Refractive index and optical dis-
persion of air. W. F. MEGGERS
and C. G. PETERS. 181.
*Resonance and ionization poten-
tials for electrons in cadmium
vapor. P. D. FOOTE and J. T.
TATE. 328.

*Specific heat of liquid ammonia.

N. S. OSBORNE and M. S. VAN
DUSEN. 201.

*Spectro-radiometric investigation
of the transmission of various
substances. W. W. COBLENTZ et
al. 574.

*Thermal expansion of alpha and of
beta brass between 0°-600°C. P.

D. MERICA and L. W. SCHAD. 573.
Thermoelectric effects, peculiar. P.
D. FOOTE and T. R. HARRISON.
545.

Voltage discharge, low, in sodium
vapor. P. D. FOOTE and F. L.
MOHLER. 513.

†X-rays, efficient production of.
P. T. WEEKS. 253.

X-rays, emission quanta phenom-
ena in. D. L. WEBSTER. 292.
X-ray protective materials. W.
S. GORTON. 251.

See also: Crystallography; Elec-
tricity; Radiometry; Radioteleg-
raphy; Soil Physics; Spectroscopy;
Terrestrial Magnetism.

Physiology. Mesencephalic root

of

565.

ease of. L. L. HARTER.
†Physoderma disease of maize. G.
R. LYMAN. 43.
*Potato-scab organism, growth of.
at various hydrogen-ion concen-
trations. L. J. GILLESPIE. 562.
†White-pine blister rust; biological

aspects of its spread. PERLEY
SPAULDING. 40.

Plant Physiology. *Boron: its dis-
tribution and effect on crops.
F. C. Cook and J. B. WILSON.
661.

Reactions of soils supporting certain
orchids. E. T. WHERRY. 589.
*Respiration and catalase activity.
in sweet corn. C. O. APPLEMAN.
632.

*Sodium nitrate, effect of, on yield,
composition, and quality of wheat.
J. DAVIDSON and J. A. LECLERC.
633.
*Wheat

flour substitutes. J. A.
LECLERC. 632.

Radiotelegraphy. Contact

detectors

in radio measurements, new meth-
od of using. L. W. AUSTIN.
569.
Resonance measurements in radio-
telegraphy with the oscillating
audion. L. W. AUSTIN. 498.
Scientific notes and news: 76, 107,
143, 184, 221, 260, 300, 334, 377,
415, 460, 508, 543, 568, 579, 611.

*Portland

250.

cement having high
magnesia content, properties of.
P. H. BATES. 250.
*Viscosity, absolute, determination
by short-tube viscosimeters. W.
H. HERSCHEL.
*Wax models of fleshy fungi.
ELEANOR C. ALLEN. 139.
*Weighing scale, stabilized plat-
form, of novel design. F. J.
SCHLINK. 368.

*Wheat-flour substitutes, chemical
analysis of. J. A. LECLERC and
H. L. WESSLING. 662.
*Wire gages, combined table of sizes
in (Bur. Stand. Circ. No. 67.) 566.

Terrestrial Magnetism. †Correspond-
ing changes in the earth's mag-
netic state and in solar activity,
1888-1916. L. A. BAUER. 506.
Cruises III and IV of the yacht
"Carnegie" in Arctic and sub-
Antarctic regions, 1914 to 1917.
J. P. AULT. 370.
†Dip-of-horizon measurements made
on the "Galilee" and "Carnegie."
W. J. PETERS. 505.
†Magnetic survey of the United
States. D. L. HAZARD. 369.
*United States magnetic tables and
charts for 1915. D. L. HAZARD.
575.

Volcanology. *Vents at Stromboli,
persistence of; bearing on vol-
canic mechanism. H. S. WASH-
INGTON. 207.

Zoology. †Batrachians, notes on cer-
tain United States species. R.
W. SHUFELDT.

26.

†Blue crab, life history of. E. P.
CHURCHILL, JR. 297.

Ciliate Infusoria, origin of. M. M.
METCALF. 427.

*Crinoids, unstalked, of the Siboga
expedition. A. H. CLARK. 503.
†Fauna of the human eye. MARTHA
B. LYON. 414.

†Fish, unrecognized anatomical
facts as affecting cultural prac-
tices. W. C. KENDALL. 213.
†Fishes, speed of. EMERSON
STRINGHAM. 178.

Fur industry of Labrador. C.
BIRDSEYE. 28.

†Haak as author of Brisson's 1762
edition of Regnum Animale. C.
W. STILES. 42.

†Opalina and the origin of the
Ciliata. M. M. METCALF. 414.
See also: Biology; Conchology; En-
tomology; Evolution; Mammal-
ogy; Ornithology; Paleontology;
Parasitology; Pathology; Physiol-

ogy.