The author's long experience as a director in astronomical observatories and in teaching the subject has given him unusual qualifications and advantages for preparing an ideal text-book.
The noteworthy feature which distinguishes this from other text-books on Astronomy is the practical way in which the subjects treated are enforced by laboratory experiments and methods.

In this the author follows the principle that Astronomy is preeminently a science of observation and should be so taught.
By placing more importance on the physical than on the mathematical facts of Astronomy the author has made every page of the book deeply interesting to the student and the general reader.

The treatment of the planets and other heavenly bodies and of the law of universal gravitation is unusually full, clear, and illuminative.

The marvelous discoveries of Astronomy in recent years, and the latest advances in methods of teaching the science, are all represented.
The illustrations are an important feature of the book.

Many of them are so ingeniously devised that they explain at a glance what pages of mere description could not make clear.
_Copies of Todd's New Astronomy will be sent, prepaid, to any address on receipt of the price by the Publishers:_ American Book Company NEW YORK.