24 SCIENTIFIC BOOKS PUBLISEEB BY
Silversmitli’s Hand-Book.
Fourth Edition»
Illustrated. 12mo. Cloth. $3.00»
A PBACTIOAL HAND-BOOK FOE MINEBS, Metallurgists, ^
and Assayers, comprising the most recent improvements in the
disintegration, amalgamation, smelting, and parting of the
Precious Ores, with a Comprehensive Digest <jf the Mining
Laws. Greatly augmented, revised, and corrected. By Jüliüs
Silversmith. Fourth edition. Profuaely illustrated. 1 vol.
12mo. Cloth. $3.00.
One of the most important features of this work is that in which the
metallurgy of the precious metals is treated of. In it the author has endeav-
ored to embody all the processes for the reduction and manipnlation of the
precious ores heretofore suecessfully employed in Germany, England, Mexico,
and the United States, together with such as have been more recently invented,
and not yet fully tested—all of which are profusely illustrated and easy of
comprehension.
Simms’ Levelling.
8vo. Cloth. $2.50.
A TEEATISE ON THE PEINCIPLES AND PEACTICE OF
LEVELLING, showing its application to purposes of Eailway
Engineering and the Construction of Boads, &c. By I rederick
\V. Simms, C. E. From the fifth London edition, revised and
corrected, with the addition of Mr. Law’s Präctical Examples for
Setting Out Eailway Curves. Illustrated with three lithographic
plates and numerous wood-cuts.
“ One of the most important text-books for the general snrveyor, and there
is scarcely a question connected with levelling for which a solution would be
sought, but that would be satisfactorily answered by Consulting this volume.’
—Mining Journal.
“ The text-book on levelling in most of onr engineering schools and Col
leges.”—Engineers.
“The publishers have rendered a Bubstantial service to the profession,
especially to the younger members, by bringing out the present edition of
Mr. Simms useful work."—Engineering.