1

OF

THE AMERICAN ASSOCIATION

FOR THE

ADVANCEMENT OF SCIENCE,

THIRTY-THIRD MEETING,

HELD AT

PHILADELPHIA, PENN.

SEPTEMBER, 1884.

SALEM:

PUBLISHED BY THE PERMANENT SECRETARY.

1885.

EDITED BY

FREDERICK W. PUTNAM, Permanent Secretary.

PRINTED AT

THE SALEM PRESS,

SALEM, MASS.

Meetings and Officers of the Association of American Geologists and Natu.

ralists

xviii

ADDRESS OF THE RETIRING PRESIDENT, C. A. YOUNG

Second report of the Committee on standards of stellar magnitudes

Report of the Committee on indexing chemical literature

List of indexes to chemical literature

SECTION A. MATHEMATICS AND ASTRONOMY.

ADDRESS OF VICE PRESIDENT HENRY T. EDDY

Phenomena observed upon the solar surface from 1881 to 1884. By S. J. PERRY

Description of a model of a ruled cubic surface known as the cylindroid. By

ROBERT S. BALL

On a geometrical interpretation of the linear bilateral quaternion equation.

By IRVING STRINGHAM

Description of the Leander McCormick Observatory of the University of Vir-

ginia. By ORMOND STONE

On the fundamental formula of statistical mechanics, with applications to as-

tronomy and thermodynamics. By J. WILLArd Gibbs

Linear functions of points, lines and planes. By E. W. HYDE

Colors of the stars. By E. C. PICKERING

On the colors of variable stars. By S. C. CHANDLER, jr.

On the original graduation of the Harvard College meridian circle in situ.

By W. A. ROGERS and GEO. B. CLARK

The average asteroid orbit and the asteroid ring. By M. W. HARRINGTON.

Micrometric observations of Jupiter's third satellite. By DAVID P. TODD

On the course of the corrections to the heliocentric longitudes of Newcomb's

tables of Uranus and Neptune. By DAVID P. TODD

.

On the general values of the obliquity of the ecliptic, and of the precession and

inclination of the equator to the invariable plane, taking into account

terms of the second order. By J. C. ADAMS

Note on Newton's theory of atmospheric refraction, and on his method of

finding the motion of the moon's apogee. By J. C. ADAMS

72

The nebulæ. By LEWIS SWIFT

A new apparatus for the study of Boyle's law. By LEROY C. COOLEY. (Title)

The lunar aurora. By JOHN HAYWOOD. (Title)

72

A. A. A. S., VOL. XXXIII.

A

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