952 
Edward S. King: A new method of determining 
the color of a star. 
Jakob Kunz and Joel Stebbins: Photometric re- 
sults at the eclipse of June 8, 1918. 
C. O. Lampland: Variable stars in the Trifid 
Nebula (N. G. C. 6514) and the Lagoon Nebula 
(N. G. C. 6523). 
C. O. Lampland: Photographie observations of 
the variable nebula, N. G. C. 2261. 
C. O. Lampland and HE. C. Slipher: Some photo- 
graphic results of the Lowell Observatory solar 
eclipse expedition. 
Henrietta S. Leavitt: The light-curves of eleven 
nove. 
W. F. Meggers: Solar and terrestrial absorption 
in the sun’s spectrum from 6400 A to 9400 A. 
John A. Miller: The total eclipse of June 8, 
1918. 
R. M. Motherwell: Nova Aquile No. 3. 
R. M. Motherwell: 12 Lacerie. 
Margaretta Palmer: The Yale index to star cata- 
logues. 
J. A. Parkhurst: The spectrum of the solar 
corona at the eclipse of June 8, 1918. 
C. D. Perrine: Changes in the spectra of some 
early-type stars showing hydrogen emission. 
C. D. Perrine: Announcement concerning the 
formation of a new catalogue of fundamental star 
positions. ( 
C. D. Perrine: The early spectrum of Nova 
Aquile No. 8. 
E. Pettit and Hannah B. Steele: Report of the 
Washburn College eclipse expedition to Matheson, 
Colorado. 
Edward C. Phillips: On a mechanical method of 
reducing transit observations. 
Edward C. Pickering: Relation of proper mo- 
tions to spectra. 
J. S. Plaskett: The 72-inch reflecting telescope. 
J. S. Plaskett: Notes on the spectrum of Nova 
Aquile No. 3. 
Susan Raymond: The variability of Antigone 
(129). 
William F. Rigge: The solar eclipse of 1918, 
June 8, as observed in Omaha. 
Luis Rodés: A differential gravimeter and its 
applications. 
Henry Norris Russell: The orbit of « Urse 
Majoris. 
R. F. Sanford: The spectrum of Bailey’s vari- 
able star No. 95 in the globular cluster M 3. 
R. F. Sanford: The orbit of the spectroscopic 
binary star p Velorum. 
SCIENCE 
[N. S. Vou. XLVIII. No. 1246 
Harlow Shapley and J. C. Duncan: The globular 
cluster Messier 22 (N. G. C. 6656). 
V. M. Slipher: The spectra of two variable 
nebule: a new type of nebular spectrum. 
V. M. Slipher: The spectrum of Nova Aquile, 
No. 3. 
V. M. Slipher: Some spectroscopic results of 
the Lowell Observatory solar eclipse expedition. 
C. E. St. John and Louise Ware: Notes on solar 
rotation. 
H. T. Stetson: War-time instruction at the Har- 
vard Astronomical Laboratory. 
H. T. Stetson: Preliminary note on the uniform- 
ity of film sensitivity of photographic plates from 
measures with the thermo-electrie photometer. 
R. M. Stewart: The position of Nova Aquile 
No. 3. 
David Todd: On the construction of high-level 
laboratories for scientific research. 
Robert Triimpler: The position and proper-mo- 
tion of Nova Aquile No. 3. 
Frank W. Very: The luminiferous ether. Its re- 
lation to the electron and to a universal atmos- 
phere. 
Frank W. Very: What is the bearing of the 
hypothesis of a gravitational limit on the current 
relativity discussion? ; 
Frank W. Very: The wasting of stellar sub- 
stance. 
Frank W. Very: Galactic and atomic vortices. 
Frank W. Very: On Nipher’s ‘‘gravitational’’ 
experiment and the anomalies of the moon’s mo- 
tion. 
R. K. Young: The probable error of radical ve- 
locities determined with the one prism spectro- 
graph of the Dominion Astrophysical Observatory. 
Meade L. Zimmer: Preliminary note on an an- 
nual term in the right ascensions. 
JOEL STEBBINS, 
Secretary 
SCIENCE 
A Weekly Journal devoted to the Advancement of 
Science, publishing the official notices and pro- 
ceedings of the American Association for 
the Advancement of Science 
Published every Friday by 
THE SCIENCE PRESS 
LANCASTER, PA. GARRISON, N. Y. 
NEW YORK, N. Y. 
Entered in the post-office at Lancaster, Pa., as second class matter 
