l parts rendered clear by experiments performed by the
student himself, but there is a happy blending of theoretical and
applied chemistry as commendable as it is unusual.

J. I. D. HINES, _Prof. of Chemistry, Cumberland University, Lebanon,
Tenn._: I am very much pleased with it, and think it will give the
student an admirable introduction to the science of chemistry.

HORACE PHILLIPS, _Prin. of High School, Elkhart, Ind._: My class has
now used it three months. It proves the most satisfactory text-book in
this branch that I have ever used. The cost of apparatus and material
is very small.

O. S. WESCOTT, _Prin. North Division H. Sch., Chicago_: My chemistry
professor says it is the most satisfactory thing he has seen, and
hopes we may be able to have it in future.

_Laboratory Manual of General Chemistry._

By R. P. WILLIAMS, Instructor in Chemistry, English High School,
Boston, and author of _Introduction to Chemical Science_. 12mo.
Boards. xvi + 200 pages. Mailing Price, 30 cents; for Introduction,
25 cents.

This Manual, prepared especially to accompany the author's
_Introduction to Chemical Science_, but suitable for use with any
text-book of chemistry, gives directions for performing one hundred of
the more important experiments in general chemistry and metal
analysis, with blanks and a model for the same, lists of apparatus and
chemicals, etc.

The Manual is commended as well-designed, simple, convenient, and
cheap,--a practical book that classes in chemistry need.

W. M. STINE, _Prof. of Chemistry, Ohio University, Athens, O._: It is
a work that has my heartiest endorsement. I consider it thoroughly
pedagogical in its principles, and its use must certainly give the
student the greatest benefit from his chemical drill. (_Dec. 30,
1888._)

_Young's General Astronomy._

A Text-book for colleges and technical schools. By CHARLES A. YOUNG,
Ph.D., LL.D., Professor of Astronomy in the College of New Jersey,
and author of _The Sun_, etc. 8vo. viii + 551 pages. Half-morocco.
Illustrated with over 250 cuts and diagrams, and supplemented with
the necessary tables. Introduction Price, $2.25. Allowance for an
old book in exchange, 40 cents.

The OBJECT of the author has been twofold. First and chiefly, to make
a book adapted for use in the college class-room; and, secondly, to
make one valuable as a permanent storehouse and directory of
information for the student's use after he has fi