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Show 14 LEA & BLANCHARD'S NEW PUBLICATIONS. I.dbrary of' Illr~stratetl Scientific Worl~s.-Contt•need. KNAPP'S CHEMICAL TECHNOLOGY. T E C H N 0 1 0 G Y; OR, CHEMISTRY APPLIED TO THE ARTS AND TO DIANUF ACTURES BY DR. F. KNAPP, Professor at the University of Giessen. EDITED, WlTH NUMirnOUS NOTES AND ADDITTONS1 BY DR. EDMUND RONALDS, AND DR. THOMAS RICHARDSON. FIRST AMERICAN EDITION, WITH NOTES AND ADDITIONS, BY PROFESSOR WALTER R. JOHNSON. In two handsome octO/Vo volumes, printed and illustrated im. the highest style of art. Volume One, lately published, with two hundred and fourteen large wood engravings. Volume Two, now ready, with two hundred and fifty wood engravings. One of the best works of modern times.-New York Commercial. We think it will prove the most popular, as it is decidedly the best of the series. Written by one who has for many years studied both theoretically and practically the processes which he describes, the descriptions are precise, and conveyed in a simple unpretending style, so that they are easily understood, while they are sufficiently full in detail to include wtthin them everything necessary to the entire comprehen- ;~~~n~~~h;r~~::~~~~~~t;~~~c':d'r:p~n a;h~ ~;~~i~~;it ~rtEfu~~~~~a~t~0 th"uc~~~~~~~~fu~l descriptions of processes to which reference is frequently made in other works, while many of them are, we believe, now for the first time presented in a complete state to the English reader.-Franklin Institute Journal. WEISBACH'S MECHANICS. PRINCIPLES OF THE MECHANICS OF MACHINERY AND ENGINEERING. BY PROFESSOR JULIUS WEISBACH. TRANSLATED AND EDITED BY PROFESSOR GORDON, OF GLASGOW. First American Edition, with Additions, BY PROF. wALTER R. JOHNSON. In two Octavo Volumes, beautifully printed. Volume One, with five hundred and fifty illustrations, just issued. Volume Two, with three hundred and thirty illustrations, now ready. This work is one of the most interesting to mathematicians that has been laid before us for some time; and we may safely term it a scientific gem.- The Bwilder The most valuable contribution to practical science that has yet appeared in this country.-Athenceum. In every way worthy of being recommended to our readers -Franklin Institu te Journal. From Charles H. Haswell, Esq., Engim.eer in Chiif, U. S. N. The design of the author in supplying the instructor with a guide for teaching, and the student with an auxiliary for the acquirement of the science of mechanics, has, in my opinion, been attained in a most successful manner. The illu~trations. in the fulln ess of their construction, and in typographical execution, are without a pamllel. It will afford me much plea•ure to recommend its use by the members of the profes sion with which ( am connected. |