The book is intended for class-room use and affords such a preparation as the student needs before entering upon the study of the larger and more elaborate works on this subject.
The appendix contains an elementary exposition of the method of least squares.
Daniel Carhart, Act. Prof. Mathematics, Western Univ. of Pa.,
Allegheny, Pa.:
"Professor Greene has supplied that which is needed to make the usual course in Astronomy in our colleges more practical."
Rodney G. Kimball, Polytechnic Institute, Brooklyn, N.Y.:
"The hasty examination which I have given it has left a very favorable impression as to its merits as a judicious compound of the practical work which it professes to cover."
SCHEINER'S ASTRONOMICAL SPECTROSCOPY
Department of Special Publication.—Revised Edition. Translated, revised and enlarged by E.B. FROST, Professor of Astronomy in Dartmouth College. 8vo. Half leather. Illustrated. xiii + 482 pages. Price by mail, $5.00; for introdoctiort, $4.75.
This work aims to explain the most practical and modern methods of research, and to state our present knowledge of the constitution, physical condition alld motions of the heavenly bodies, as revealed by the spectroscope.
Edward S. Holden, Director of the Lick Observatory, Mt. Hamilton,
California: