Regular Meeting, May 18th, 1863.
President in the Chair.
Nine members present.
Messrs. W. S. Sullivant, and Leo Lesquereux, of Columbus, Ohio, were elected Corresponding Members, and Rev. T. Starr King a Resident Member.
Donations to the Cabinet were received as follows:
Specimens of copper ore from the Mammoth Lode, Del Norte County, by Dr. Trask.