14 LEA & BLANCHARD'S NEW PUBLICATIONS. 



Jjihrary of Illustrated Scientific Works. — Continued. 



KNAPP'S CHEMICAL TECHNOLOGY. 



T E C H Nl) L G Y; 



OR, CKEMISTRY APPLIED TO THE ARTS AND TO MANUFACTURES 

 BY DR. F. KNAPP, 



Professor at the University of Giessen. 



Edited, with nitmerous Notes and Additions, by 



DR. EDMUND RONALDS, and DR. THOMAS RICHARDSON. 



First American Edition, with Notes and Additions, 



BY PROFESSOR WALTER R, JOHNSON. 



In two handsome octavo volumes, pritited and illustrated in 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 sim- 

 ple unpretending style, so that they are easily understood, while they are sufficiently 

 full in detail to include within them everything necessary to the entire comprehen- 

 sion of the operations. The work is also carefully brought down to include the most 

 recent improvements introduced upon the continent of Europe, and thus gives us full 

 descriptions of processes to which reference is frequently made in other vv-orks, while 

 many ofthem 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 PRorEssoR JULIUS WEISBACH. 



TRANSLATED AND EDITED 



BY PROFESSOR GORDON, OF GLASGOW. 



First American Edition, ■with Additions, 



By Prof. WALTER R. JOHNSON. 



In two Octavo Volumes, heautifidly 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 be- 

 fore us for some time ; and we may safely term it a scientific gem.— The Builder 



The most valuable contribution to practical science that has yet appeared in this 

 country. — Athenanun. 



Ill every way worthy of being recommended to our readers —Franklin Institute 

 Journal. 



From Charles H. Haswell, Esq., Engineer in Chief. 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*tralions, in the 

 fullness of their construction, and in typographical execution, are without a parallel. 

 It will aiford me much pleasure to recommend its use by the members of the pro- 

 fession with wliicli I am coiinecled. 



