National Academy of Sciences.

The next annual *stated session* of the NATIONAL ACADEMY OF SCIENCES will be held in Washington, D. C., commencing Tuesday, April 21, 1885, at 11 A. M.

The place of meeting will be at the National Museum.

The Council is requested to meet at 10 A. M.

A list of candidates nominated is enclosed herewith; also an envelope, in which the ballot for preference may be sealed, and enclosed in another envelope addressed to the Home Secretary. On the latter the name of the sender should be endorsed. The former envelope will be opened only by the tellers.

The attention of members who have nominated candidates is especially called to the necessity of having a list of the published works of each nominee supplied to the Home Secretary before the day of election.

The Home Secretary has been directed by the Council to call the attention of members to the necessity of paying their dues before voting.

Members who intend to present communications are requested to send the titles to the Home Secretary before April 20, so that lists may be printed.

The time required for the reading of a paper should be stated.

A. HALL,
*Home Secretary*.

NAVAL OBSERVATORY,
WASHINGTON, D. C., March 17, 1885.