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PROCEEDINGS
OF THE
AMERICAN ACADEMY OF ARTS AND SCIENCES.
CONTENTS.
I. Dimensions of the Fixed Stars, with especial reference to Binaries
and Variables of the Algol Type. BY EDWARD C. PICK-
ERING
II. Appendix to Paper on the Mechanical Equivalent of Heat, con-
taining the Comparison with Dr. Joule's Thermometer. By
H. A. ROWLAND
PAGE
1
38
III. No. XXIII. -The Magnetic Moment of Fleitman's Nickel.
By G. E. Bullard
46
IV. Researches on the Substituted Benzyl Compounds. Ninth Paper.
BY C. LORING JACKSON and J. FLEMING White
V. Contributions to North American Botany. BY ASA GRAY. .
VI. Researches on the Complex Inorganic Acids. BY WOLCOTT
GIBBS, M.D.
VII. A Theory of the Constitution of the Sun founded upon Spec-
troscopic Observations original and other. BY CHARLES S.
HASTINGS.
140
VIII. XIII.-Acoustic Phenomenon noticed in a Crookes' Tube. BY
PROFESSOR CHAS. R. CROSS
155
IX. Contributions from the Chemical Laboratory of Harvard College.