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THE

AMERICAN JOURNAL

SCIENCE AND ARTS.

CONDUCTED BY

PROFESSORS B. SILLIMAN AND JAMES D. DANA,

IN CONNECTION WITH

Professors ASA GRAY, LOUIS AGASSIZ, AND
WOLCOTT GIBBS, OF CAMBRIDGE,

AND
PROFESSORS S. W. JOHNSON, GEO. J. BRUSH, AND

H. A. NEWTON, OF NEW HAVEN.

AND

SECOND SERIES. •
VOL. XLI. - [WHOLE NUMBER, XCI.]

Nos. 121, 122, 123.
JANUARY, MARCH, MAY, 1866.

NEW HAVEN: EDITORS.

- 1866.

PRINTED BY E. HAYES, 426 CHAPEL ST.

CONTENTS OF VOLUME XLI.

NUMBER CXXI.

Page.

Art. I. Sir William Jackson Hooker, . . .

II. On a boulder, and Glacial Scratches, at Englewood, N. J.;

by Rev. W. B. Dwight, . . . . . . . 10

III. On a Subsidence of land at Coxsackie, N. Y.; by Rev. W. B.

Dwight, . . . . . . . . . 12

IV. On the Crystalline Nature of Glass; by CHARLES M..

WETHERILL, Ph.D., M.D., . . . . . . 16

V. Contributions from the Sheffield Laboratory of Yale Col.

lege. No. IX.-—On the assimilation of complex nitrogenous

bodies by Vegetation ; by S. W. Johnson, - - 27

VI. Results of observations on the Drift Phenomena of Labrador

and the Atlantic coast southward; by A. S. PACKARD, Jr., M.D. 30

VII. On a Process of Elementary Analysis admitting of the de-

termination of Carbon, Hydrogen and Nitrogen at a single

combustion ; by C. Gilbert Wheeler, . . . . 33

VIII. On a new Process for the determination of Sulphur in Or

ganic Compounds, by combustion with Oxygen Gas and Per-

oxyd of Lead; by C. M. Warren, . . . . 40

IX. Description of an Automatic Registering and Printing Ba.

rometer; by G. W. Hough, A.M., -

X. Observations upon Shooting Stars in November, 1865, . 58

XI. On Molecular Physics ; by Prof. W. A. Norton, . . ,61

XII. The Distribution and Migrations of North American Birds ;

by Spencer F. BAIRD, . . . . . . . 78

XIII. Experiments on Mechanical Polarity; by Pliny EARLE

Chase, M.A., . . . . . . . . 90

XIV. Notice of a new group of Eocene Shells; by T. A. CONRAD, 96

XV. Professor Treadwell's Improvements in constructing Cannon ;

Address of the President of the American Academy of Arts

and Sciences (Prof. Asa Gray) upon the presentation of the

Rumford Medal to Professor TREADWELL, · · · 97

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