10 HENRY CAREY BATRD'S CATALOGUE. 



TJIRCKS. PERPETUAL MOTION : 



Or Search for Self-Motive Power during the 17tb, 18th, and 

 19th centuries. Illustrated from various authentic sources in 

 Papers, Essays, Letters, Paragraphs, and numerous Patent 

 Specifications, with an Introductory Essay by HENRY DIRCKS, 

 C. E. Illustrated by numerous engravings of machines. 

 12mo., cloth $3 50 



niXON. THE PRACTICAL MILLWRIGHT'S AND ENGINEER'S 

 ** GUIDE : 



Or Tables for Finding the Diameter and Power of Cogwheels ; 

 Diameter, Weight, and Power of Shafts ; Diameter and Strength 

 of Bolts, etc. etc. By THOMAS DIXON. 12mo., cloth. $1 50 



TpNC AN. PRACTICAL SURVEYOR'S GUIDE: 



Containing the necessary information to make any person, of 

 common capacity, a finished land surveyor without the aid of 

 a teacher. By ANDREW DUNCAN. Illustrated. 12mo., cloth. 



$1 25 



TjUSSAUCE. A NEW AND COMPLETE TREATISE ON THE 

 ^ ARTS OF TANNING, CURRYING, AND LEATHER DRESS- 

 ING : 



Comprising all the Discoveries and Improvements made in 

 France, Great Britain, and the United States. Edited from 

 Notes and Documents of Messrs. Sallerou, Grouvelle, Duval, 

 Dessables, Labarraque, Payen, Rene*, De Fontenelle, Mala- 

 peyre, etc. etc. By Prof. H. DUSSAUCE, Chemist. Illustrated 



by 212 wood engravings. 8vo $10 00 



TpSSAUCE. A GENERAL TREATISE ON THE MANUFACTURE 

 OF SOAP, THEORETICAL AND PRACTICAL: 

 Comprising the Chemistry of the Art, a Description of all the Raw 

 Materials and their Uses. Directions for the Establishment of a 

 Soap Factory, with the necessary Apparatus, Instructions in the 

 Manufacture of every variety of Soap, the Assay and Determination 

 of the Value of Alkalies, Fatty Substances, Soaps, etc. etc. By 

 PROFESSOR H. DUSSAUCE. With an Appendix, containing Ex- 

 tracts from the Reports of the International Jury on Soaps, as 

 exhibited in the Paris Universal Exposition, 1867, numerous 

 Tables, etc. etc. Illustrated by engravings. In one volume 8vo. 

 of over 800 pages $10 00 



