STANDARD AMERICAN TEXT-BOOKS

ON

Geology, Physics, and Chemistry,

BY PROFESSORS DANA AND SILLIMAN.

### Manual of Geology.

Treating of the Principles of the Science, with special reference to American Geological History. By JAMES D. DANA, M. A., LL. D., Professor of Geology in Yale College. 1 vol. Svo., 800 pages, illustrated by a Chart of the World, and over 1000 Figures, mostly from American sources. Price, beveled muslin, $5.00; half-turkey morocco, $6.00

### A Text-Book of Geology.

Designed for Schools, Academies, and private Students. By Prof. J. D. DANA. With 375 Illustrations. Square 12mo. Price, $2.00.

### Principles of Physics, or Natural Philosophy.

By Prof. BENJAMIN SILLIMAN. 738 pages. With 722 illustrations. Crown 8 vo. Price, $3.50.

### First Principles of Chemistry.

By Prof. BENJAMIN SILLIMAN. 555 pages. With 423 Illustrations. 57th edition. Price, $2.00.

The high position conceded to Professors Dana and Silliman by scientists, in Europe as well as in America, will commend their respective books to all interested in the science of which they treat.

For sale by all Booksellers; or sent by mail, prepaid, upon receipt of price.

THEODORE BLISS & CO., Publishers,

PHILADELPHIA.

SILLIMAN'S CHEMICAL CLASS-BOOK.

IN PREPARATION.

BY PROF. SILLIMAN, OF YALE COLLEGE,

THE CHEMICAL CLASS-BOOK; Embracing an
outline of CHEMICAL PHILOSOPHY, adapted to the
wants of the American Teacher and Student; accom-
panied by problems and exercises for the Black-
board, and amply illustrated for the performance of
experiments.

The Publishers beg to assure teachers and students that every
means will be employed to present this work in a form worthy of
its source, and as speedily as proper regard to accuracy and com-
pleteness will warrant. It is not a new edition of the "First
Principles" of the same author, the sales of which have exceeded
fifty large editions, but a new book designed to cover the same
ground, substantially; omitting, however, all matters purely
Physical, and adapted to the present advanced state of the
science which has already made, or must speedily make, all
former text-books on Chemistry obsolete. The science demands—
what teachers and students have a right to expect— a Chemical
Class-Book which shall bring out the facts and principles of the
science in a manner adapted to discipline the mental powers by
its logical method and careful analysis, with the omission of all
that is not essential to these ends. All thought, therefore, of
crowding into the small space of a class-book a synopsis of the
entire detail of facts must be abandoned, and a severe electricism
exercised in the selection of only those subjects which can be
fairly brought within the scope of such a text-book.

A complete revolution has taken place in the method of teach-
ing Chemistry in many of our leading institutions of learning, and
is still in progress. But the great and substantial advantages it
brings us are an ample compensation for the trouble of learning
anew the nomenclature and notations, and of expurgating some
old ideas which have long stood in the way of the student's pro-
gress in Chemistry.