SCIENTIFIC' PUBLICATIONS. 41 



SHAW, ( Lieut. -CoL) WM. J. Studies in Map Reading 



and Field Sketching ; an aid to passing outdoor examinations in these 

 subjects. Illustrated with fifteen folding plates. 12mo, clotb, illus- 

 trated, 148 pages net. $2.60 



Tactical Operations for Field Officers ; being up-to- 

 date schemes worked out on training grounds at home stations. 

 With folding plates and maps. l'2mo, cloth, illus., 321 page?. . .$3.00 



SHELDON, Prof. S., Ph. D., and HOB ART, MASON, 



B. S. Dynamo Electric Machinery ; Its Construction, Design and 

 Operation. Direct Current Machines. Second edition. 8vo, cloth, 

 illustrated net. $2.60 



- Alternating Current Machines ; being the second 



volume of the author's " Dynamo Electric Machinery ; its Construc- 

 tion, Design, and Operation." With many diagrams and figures. 

 (Binding uniform with volume I.) 8vo, cloth, illustrated, .net, $2.50 



SHIELDS, J. E. Notes on Engineering Construction. 



Embracing Discussions of the Principles involved, and Descriptions 

 of the Material employed in Tunnelling, Bridging, Canal and Road 

 Building, etc. 12mo, cloth $1.60 



SHOCK, WM. H. Steam Boilers, Their Design, Con- 

 struction and Management. 4to, half morocco $15.00 



SHRE VE, S. H. A Treatise on the Strength of Bridges 



and K<><>fs. Comprising the determination of Algebraic formulas for 

 strains in Horizontal, Inclined or Rafter, Triangular, Bowstring, 

 Lenticular, and other Truases, from fixed and moving loads, with 

 practical applications, and examples, for the use of Students and 

 Engineers. 87 woodcut ill us. fourth edition. 8vo, cloth $3.50 



SHUNK, W. F. The Field Engineer. A Handy Book 



of practice in the Survey, Location, and Truck-work of Railroads, con- 

 taining a large collection of Rules and Tables, original and selected, 

 applicable to both the Standard and Narrow Gauge, and prepared 

 with special reference to the wants of the young Engineer. fif- 

 teenth edition, revised and enlarged. With an addenda. 12mo, mo- 

 rocco, tucks $2.50 



SIMMS, F. W. A Treatise on the Principles and Prac- 

 tice of Levelling. Showing its application to purposes of Railway 

 Engineering, and the Construction of Roads, etc. Revised and cor- 

 rected, with the addition of Mr. Laws' Practical Examples for setting 

 out Railway Curves. Illustrated. 8vo, cloth, $2.60 



- Practical Tunneling. Fourth Edition, Revised 



and greatly extended. With additional chapters illustrating recent 

 practice by D. Kinnear Clark. With 36 plates and other illustrations. 

 Imperial 8vo, cloth $12.00 



