OF

THE AMERICAN ASSOCIATION

FOR THE

ADVANCEMENT OF SCIENCE.

FOURTH MEETING,

HELD AT NEW HAVEN, CONN., AUGUST, 1850.

WASHINGTON CITY.
PUBLISHED BY S. F. BAIRD,
NEW YORK: G. P. PUTNAM.

1851.

EDITED BY

SPENCER F. BAIRD,

Permanent Secretary.

EDWARD O. JENKINS, PRINTER,

114 Nassau street, N. Y.

Dr. A. L. ELWYN, Treasurer.

Dr. W. J. BURNETT, Secretary Sect. Geology and

Nat. History.

Prof. W. B. ROGERS, Secretary Sect. Physics

and Mathematics.

Prof. R. E. ROGERS, Secretary Sect. Chemistry

and Mineralogy.

STANDING COMMITTEE.

Prof. L. AGASSIZ.

E. C. HERRICK, Esq., Ex Officio. Prof. B. SILLIMAN, Jun.

Prof. D. OLMSTED.

Prof. A. D. BACHE,

Dr. A. L. ELWYN,

Prof. JOSEPH HENRY.

Prof. E. N. HORSFORD.

W. C. REDFIELD, Esq.

Prof. H. D. ROGERS.

Prof. J. P. NORTON.

LOCAL COMMITTEE FOR THE MEETING AT NEW HAVEN.

Rev. Dr. T. D. WOOLSEY.

Prof. D. OLMSTED.

Prof. N. PORTER.

WILLIAM HILLHOUSE, Esq.

Hon. A. N. SKINNER.

Dr. JONATHAN KNIGHT.

Prof. E. E. SALISBURY.

Prof. B. SILLIMAN, Jr.

J. D. DANA.

SPECIAL COMMITTEES.

Committee on the Communication of Lieut. Maury upon Winds and Currents.

Pres. SPARKS, of Cambridge, Mass. | WM. C. REDFIELD, Esq., of N. York. Prof. LEWIS R. GIBBES, of Charles- J. INGERSOLL BOWDITCH, Esq., of Boston, Mass.

Prof. BENJAMIN PEIRCE, of Cam- Prof. ARNOLD GUYOT, of Cambridge, Mass.

Committee on the Prime Meridian.

Prof. A. D. BACHE, Sup't. U. S. | Prof. COURTENAY, University of Coast Survey.

Lieut. M. F. MAURY, Sup't. Na- Prof. S. ALEXANDER, of Princeton,

Committee on the Subject of a Uniform Standard of Weights and Measures.

Prof. JOSEPH HENRY, of Washing- | Lieut. M. F. MAURY, of Washington, D. C.

Prof. STANLEY, of N. Haven, Conn.

Committee on the Publication of an Astronomical Journal: appointed in the Physical Section.

ton, D. C.

Dr. B. A. GOULD, of Cambridge, | Prof. A. D. BACHE, of WashingMass. Prof. J. S. HUBBARD, of Washing-Lieut. M. F. MAURY, of Washington, D. C. ton, D. C. Prof. JOHN H. C. COFFIN, of Lieut. C. H. DAVIS, of Cambridge, Washington, D. C.

Mass.

bridge, Mass.

SEARS C. WALKER, Esq., of Wash- Prof. BENJAMIN PEIRCE, of Camington, D. C.

Prof. JOSEPH HENRY, of Washing

ton, D. C.

Committee to Memorialize the State Governments on Geological Surveys.

Dr. R. W. GIBBES, of Columbia, | Dr. S. G. MORTON, of Philadelphia.
S. C.
Dr. C. T. JACKSON, of Boston.
Pres. E. HITCHCOCK, of Amherst Gov. J. W. MATHEWS, of Jackson,
College.

Prof. H. D. ROGERS, of Boston.
Prof. L. AGASSIZ, of Cambridge,
Mass.

Mississippi.

Dr. G. TROOST, of Nashville, Tenn. Prof. Wм. B. ROGERS, of Charlottesville.

Prof. B. SILLIMAN, Sen., of New J. HAMILTON COUPER, Esq., of Haven, Conn.

Darien, Georgia.

Brunswick, N. J.

Dr. T. ROMEYN BECK, of Albany, Prof. LEWIS C. BECK, of New
New York.
JOSEPH DELAFIELD, Esq., of New Prof. JOSEPH HENRY, of Washing-
York.

ton, D. C.

Committee to Memorialize the Legislature of Pennsylvania in Reference to the Publication of the Final Geological Report of that State.

Pres. E. HITCHCOCK, of Amherst, | Prof. A. D. BACHE, of Washing-
Mass.
WM. C. REDFIELD, Esq., of New Prof. JAMES HALL, of Albany.

York.

SOLOMON W. ROBERTS, Esq., of
Philadelphia.

ton.

Prof. HENRY D. ROGERS, of Bos

ton.