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The hall was darkened, and Mr. CAMPBELL exhibited about seventyfive lantern slides. These included copies of the recent photographs of nebulæ, clusters and the moon taken at the Lick Observatory and elsewhere; diagrams illustrating the principles and methods of spectrum analysis, photographs of famous spectroscopes; and photographs of star spectra; in connection with which the recent spectroscopic observations were reviewed, and the nature of the present problems explained.

The meeting then adjourned.

MINUTES OF THE NINTH REGULAR MEETING OF THE
CHICAGO SECTION A. S. P.

The ninth regular meeting of the Chicago Section A. S. P. was held Friday evening, October 23, 1891, at the Kenwood Astro-Physical Observatory, Chicago.

Mr. G. A. DOUGLASS presided. The minutes of the last meeting were accepted as read. G. E. HALE then gave an account of a recent visit to various observatories and laboratories in Europe, after which observations were made by the members with the 12-inch telescope.

GEORGE E. HALE, Secretary.

MINUTES OF THE TENTH REGULAR MEETING OF THE
CHICAGO SECTION A. S. P.

The tenth regular meeting of the Chicago Section A. S. P. was held Saturday evening, December 5, 1891, at the Kenwood Astro-Physical Observatory, Chicago.

Mr. G. A. DOUGLASS occupied the chair. The minutes of last meeting were accepted as read. Mr. A. C. BEHR read a translation of a paper on "The Rotation of the Sun," published in “Sirius,” by Prof. A. SCHMIDT, and supplemented it by a few remarks. Mr. G. E. HALE explained the spectroscopic method used in determining the velocity of the sun's rotation, and discussed various questions raised in the paper. An account was given of a solar eruption of only fifteen minutes duration which was observed simultaneously at Kalocsa, Hungary, and at the Kenwood Observatory, Chicago. Results of recent progress in solar prominence photography were announced, and a description was given of a visit to the "Urania," in Berlin. After the adjournment of the meeting the members observed Jupiter, the Orion nebula, and other objects with the 12-inch telescope.

Application for membership in the A. S. P. and Chicago Section was received from—

Mr. F. R. BISSELL, 183 La Salle Street, Chicago.

GEORGE E. HALE, Secretary.

50 Publications of the Astronomical Society, &c.

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OFFICERS OF THE SOCIETY.

WM. M. PIERSON (508 California Street, S. F.),

FRANK SOULE (Students' Observatory, Berkeley),

E. J. MOLERA (850 Van Ness Avenue, S. F.),

J. M. SCHAEBERLE (Lick Observatory),

CHAS. BURCKHALTER (Chabot Observatory, Oakland),

W. W. CAMPBELL (Lick Observatory),

F. R. ZIEL (410 California Street, S. F.),

President

Vice-Presidents

Secretaries

Treasurer

Board of Directors-Messrs. ALVORD, BURCKHALTER, CAMPBELL, HILBORN, HILL, HOLDEN, MOLERA, PIERSON, SCHAEBERLE, SOULÉ, ZIEL.

Finance Committee-Messrs. ZIEL, HILBORN, BURCKHALTER.

Committee on Publication-Messrs. HOLDEN, YALE, CAMPBELL.

Library Committee-Messrs. MOLERA, VON GELDERN.

Committee on the Comet Medal-Messrs. HOLDEN (ex-officio), SCHAEBERLE, BURCKHALTER. OFFICERS OF THE CHICAGO SECTION.

Executive Committee-Messrs. DOUGLASS (Chairman), EWELL, HALE (Secretary), PIKE,

THWING.

NOTICE.

The attention of new members is called to Article VIII of the By-Laws, which provides that the annual subscription, paid on election, covers the calendar year only Subsequent annual payments are due on January 1st of each succeeding calendar year. This rule is necessary in order to make our book-keeping as simple as possible. Dues sent by mail should be directed to Astronomical Society of the Pacific, 819 Market Street, San Francisco.

It is intended that each member of the Society shall receive a copy of each one of the Publications for the year in which he was elected to membership and for all subsequent years. If there have been (unfortunately) any omissions in this matter, it is requested that the Secretaries he at once notified, in order that the missing numbers may be supplied. Members are requested to preserve the copies of the Publications of the Society as sent to them. Once each year a title page and contents of the preceding numbers will also be sent to the members, who can then bind the numbers together into a volume. Complete volumes for past years will also be supplied, to members only, so far as the stock in hand is sufficient, on the payment of two dollars to either of the Secretaries. Any non-resident member within the United States can obtain books from the Society's library by sending his library card with ten cents in stamps to the Secretary A. S. P., 819 Market Street, San Francisco, who will return the book and the card.

The Committee on Publication desires to say that the order in which papers are printed in the Publications is decided simply by convenience. In a general way, those papers are printed first which are earliest accepted for publication. It is not possible to send proof sheets of papers to be printed to authors whose residence is not within the United States.

The titles of papers for reading should be communicated to either of the Secretaries as early as possible, as well as any changes in addresses. The Secretary in San Francisco will send to any member of the Society suitable stationery stamped with the seal of the Society, at cost price, as follows: a block of letter paper, 40 cents; of note paper, 25 cents; a package of envelopes, 25 cents. These prices include postage, and should be remitted by money order or in U. S. postage stamps. The sendings are at the risk of the member.

Those members who propose to attend any or all of the meetings at Mount Hamilton during the summer should communicate with "The Secretary Astronomical Society of the Pacific," at the rooms of the Society, 819 Market Street, San Francisco, in order that arrangements may be made for transportation, lodging, etc.

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