YOUNG'S GENERAL ASTRONOMY

A Text-book for Colleges and Technical Schools. By CHARLES A . YOUNG, Professor of Astronomy in the College of New Jersey. 8vo. viii + 551 pages. Half morocco. Illustrated with over 250 cuts and and diagrams, and supplemented with the necessary tables. Mailing price, $2.50; for introduction, $2.25.

In amount, the work has been adjusted as closely as possible to the prevailing courses of study in our colleges. By omitting the fine print, a briefer course may be arranged.

The eminence of Professor Young as an original investigator in astronomy, a lecturer and writer on the subject, and an instructor of college classes, and his scrupulous care in preparing this volume, led the publishers to present the work with the highest confidence; and this confidence has been fully justified by the event. More than one hundred colleges adopted the work within a year from its publication, and it is conceded to be the best astronomical text-book of its grade to be found anywhere.

Edw. C. Pickering, Prof. of Astronomy, Harvard University:

"I think this work the best of its kind, and admirably adapted to its purpose."

S.P. Langley, Sec. Smithsonian Inst., Washington, D.C.:

"I know no better book (not to say as good a one) for its purpose, on the subject."

AN INTRODUCTION TO SPHERICAL AND PRACTICAL ASTRONOMY

By DASCOM GREENE, Professor of Mathematics and Astronomy in the
Rensselaer Polytechnic Institute, Troy, N.Y. NW. Cloth.
Illustrated. viii + 158 pages. Mailing price, $1.60; for
introduction, $1.50.