1). VAST NO STRAND. 37 



Van Buren's Formulas. 



8vo. Cloth. $2.00. 



INVESTIGATIONS OF FORMULAS, for the Strength of the 

 Iron Parts of Steam Machinery. By J. D. VAN BUREN, Jr., 0. E. 

 Illustrated. 



This is an analytical discussion of the formulae employed by mechanical 

 engineers in determining the rupturing or crippling pressure in the different 

 parts of a machine. The formulae are founded upon the principle, that the 

 different parts of a machine should be equally strong, and are developed in 

 reference to the ultimate strength of the material in order to leave the choice 

 of a factor of safety to the judgment of the designer. Sillimaris Journal. 



Joynson on Machine Gearing. 



8vo. Cloth. $2.00. 



THE MECHANIC'S AND STUDENT'S GUIDE in the Design- 

 ing and Construction of General Machine Gearing, as Eccentrics, 

 Screws, Toothed Wheels, etc., and the Drawing of Rectilineal 

 and Curved Surfaces ; with Practical Rules and Details. Edited 

 by FRANCIS HERBERT JOYNSON. Illustrated with 18 folded 

 plates. 



" The aim of this work is to be a guide to mechanics in the designing and 

 construction of general machine-gearing. This design it -well fulfils, being 

 plainly and sensibly written, and profusely illustrated." Sunday Times. 



Barnard's Report, Paris Exposition, 



1867. 



Illustrated. 8vo. Cloth. $5.00. 



REPORT ON MACHINERY AND PROCESSES ON THE 

 INDUSTRIAL ARTS AND APPARATUS OF THE EXACT 

 SCIENCES. By F. A. P. BARNARD, LL.D. Paris Universal 

 Exposition, 1867. 



" We have in this volume the results of Dr. Barnard's study of the Paris 

 Exposition of 1867, in the form of an official Report of the Government. It 

 is the most exhaustive treatise upon modern inventions that has appeared 

 since the Universal Exhibition of 1851, and we doubt if anything equal to it 

 has appeared this century. "-Journal Applied Chemistry. 



