6 SCIENTIFIC BOOKS PUBLISHED BY 



Stoney on Strains, 



New and Revised Edition, with numerous illustrations. 



Royal 8vo, 664 pp. Cloth. $15.00. 



THE THEORY OF STRAINS IN GIRDEES and Similar Struc 

 tures, with Observations on the Application of Theory to Practice, 

 and Tables of Strength and other Properties of Materials. By 

 BIKDON B. STONET, B. A. 



Roebling s Bridges. 



Imperial folio. Cloth. $25.00. 



LONG AND SHORT SPAN RAILWAY BRIDGES. By JOHIT 

 A. ROEBLING, C. E. Illustrated with large copperplate engrav 

 ings of plans and views. 



List of Plates 



1. Parabolic Truss Railway Bridge. 2, 3, 4, 5, 6. Details of Parabolic 

 Truss, -with centre span 500 feet in the clear. 7. Plan and View of a Bridge 

 over the Mississippi River, at St. Louis, for railway and common travel. 8, 9, 

 10, 11, 12. Details and View of St. Louis Bridge. 13. Railroad Bridge over 

 the Ohio. 



Diedrichs Theory of Strains. 



8vo. Cloth. $5.00. 



A Compendium for the Calculation and Construction of Bridges, 

 Roofs, and Cranes, with the Application of Trigonometrical 

 Notes. Containing the most comprehensive information in re 

 gard to the Resulting Strains for a permanent Load, as also for 

 a combined (Permanent and Rolling) Load. In two sections 

 adapted to the requirements of the present time. By JOHN DIED- 

 EICHS. Illustrated by numerous plates and diagrams, 



&quot; The want of a compact, universal and popular treatise on the Construc 

 tion of Roofs and Bridges especially one treating of the influence of a varia 

 ble load and the unsatisfactory essays of different authors on the subject, 

 induced me to prepare this work.&quot; i. 



