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Notes from Pacific Coast Observatories
Nova Aquila, No. 2, by J. D. MADDRILL
O'HALLORAN, ROSE, Variable-Star Notes
OMORI, F., Observations of Distant Earthquakes, 193; On Seismic
Motion and Some Relations of Earthquakes to Other Phe-

nomena

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50

235

140

Parallax of the Central Star of the Annular Nebula in Lyra, On
the, by B. L. NEWKIRK
PERRINE, C. D., Color of the Shadows of Jupiter's Satellites
Projected on the Disk of the Planet, 77; The Lick Observa-
tory-Crocker Eclipse Expedition to Spain (with W W. CAMP-
BELL), 13; The Measurement and Reduction of the Photo-
graphs of Eros Made with the Crossley Reflector in 1900, 226;
Note on Some Simplifications in the Reduction of Stellar
Photographs, 309; Orbit of the Sixth Satellite of Jupiter,
80; Reobservation of Jupiter's Sixth Satellite, 271; Reobserva-
tion of Phabe, the Ninth Satellite of Saturn, 271; Reobserva-
tion of the Seventh Satellite of Jupiter, 274; The Sixth and
Seventh Satellites of Jupiter at the Opposition of 1905-1906. 78
Photometer Observations of B. D. + 51°.3676, by J. D. MADDRILL.. 312
Planetary Inversion .

278

Planetary Phenomena, by M. MCNEIL.

55, 128, 209, 247, 265, 302

Planets, Motions of the Inner, by B. L. NEWKIRK
Polaris, The Radial Motions of, by W. W. CAMPBELL
Proper Motion, Stereoscopic Determinations of, by B. L. NEW-

.

316

307

254

KIRK

Radial Velocity of a Draconis, Note on the Recent Observations
of the, by J. H. MOORE

66

Radio-activity, A Review of Certain Researches on, that have a
Bearing upon Astronomical Questions, by B. L. NEWKIRK. 289
Refraction, Note on Anomalous, by FRANK SCHLESINGER and
G. B. BLAIR

Reports of Observatories for 1905
Satellites. (See Jupiter and Saturn.)

46

146

Saturn:

Eclipses of the Satellites of, Occurring in the Year 1906, by
H. STRUVE

203

Reobservation of Phabe, the Ninth Satellite of, by C. D.
PERRINE

271

SCHLESINGER, FRANK, Note on Anomalous Refraction (with G.
B. BLAIR)

46

SEE, T. J. J., Report of Naval Observatory, Mare Island, 1905
Seismological Stations in California, by A. O. LEUSCHNER
SMITH, ELLIOTT, Photographs of Comet c 1905

156

218

83

Snow Telescope, Some Tests of the, by G. E. HALE

73

Solar Observatory:

The Five-foot Reflector of the, by G. E. HALE
New Members of the Staff of the

PAGE

224

228

A 100-inch Mirror for the, by G. E. HALE

272

Organization of the Computing Division of the, by G. E. HALE

223

Report of the, of the Carnegie Institution of Washington for

1905, by G. E. HALE

156

(See, also, Mt. Wilson.)

Solar Research, A Programme of, by G. E. HALE

59

Spectra of Sun-Spots. (See Sun-Spots.)

Spectroscopic Binaries:

First Catalogue of, by W. W. CAMPBELL and H. D. CURTIS
Seven New, by W. W. CAMPBELL and J. H. MOORE

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Stellar Parallax Work at the Yale Observatory, by R. G. AITKEN.
Stellar Photographs, Note on Some Simplifications in the Reduc-
tion of, by C. D. PERRINE

275

309

STRUVE, HERMANN, Eclipses of the Satellites of Saturn Occurring
in the Year 1906

203

Students' Observatory, Berkeley, Report of, 1905, by A. O.

LEUSCHNER

164

Sun-Spot Spectra, On the Cause of the Characteristic Phenomena
of, by G E. HALE, W. S. ADAMS, and H. G. GALE
Sun-Spots:

268

Identification of Faint Lines in the Spectra of, by G. E. HALE
Note on the Level of, by G. E. HALE

Photographic Observations of the Spectra of, by G. E. HALE
and W. S. ADAMS.

Total Eclipses. (See Eclipses.)

TOWNLEY, S. D., Address of the Retiring President of the Society
in Awarding the Bruce Medal to Geheimer Ober-reg. Rath
Professor Dr. HERMANN CARL VOGEL, 101; The California
Earthquake at Ukiah, 217; The Fifth Satellite of Jupiter, 94;
The Harvard Five-foot Reflector, 170; The Latitude of Ukiah
before and after April 18, 1906, 241; Report of the Inter-
national Latitude Observatory, Ukiah, 1905, 147; Variation of
Latitude

222

250

76

315

Transit Micrometer, A Test of a, by JOHN F. HAYFORD, Review
by A. S. FLINT

Untersuchungen an den Spektren der helleren Gasnebel, von J.
SCHEINER und J. WILSING, Review by J. H. MOORE
Variable Radial Velocity and the Period of SU Cygni, The, by
J. D. MADDRILL

Variable Star, A New, by R. G. AITKEN

90

176

252

312

328 Publications of the Astronomical Society, &c.

Variable-Star Notes, by Rose O'HALLORAN

Variable Stars, Observations of, in 1905, by TORVALD KÖHL
Variable Velocity, Two Stars with, by W. W. CAMPBELL and J. H.
MOORE

Variation of Latitude, Note on, by S. D. TOWNLEY

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50

122

137

315

VOGEL, CARL HERMANN, Award of the Bruce Medal to
Yale Observatory, Stellar Parallax Work at the, by R. G. AITKEN. 275

.

.

101, 183

CONTENTS.

Page

Newkirk, Burt L., A Review of Certain Researches on Radioactivity That Have a Bearing upon Astronomical Questions . 289

McNeill, M., Planetary Phenomena for January and February, 1907

302

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Minutes of Meeting of the Society, November 24, 1906

319.

Officers of the Society.

320

Index to Volume XVIII

321

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