WORKS PUBLISHED BY LOCKWOOD & CO. 7 



Strains. 



THE STRAINS ON STRUCTURES OF IRONWORK; 

 with Practical Remarks on Iron Construction. By F. W. SHEILDS, 

 M. Inst. C.E. Second Edition, with 5 plates. Royal 8vo, 5-r. cloth. 

 CONTENTS. Introductory Remarks ; Beams Loaded at Centre ; Beams Loaded at 

 unequal distances between supports ; Beams uniformly Loaded ; Girders with triangu- 

 lar bracing Loaded at centre ; Ditto, Loaded at unequal distances between supports ; 

 Ditto, uniformly Loaded ; Calculation of the Strains on Girders with triangular 

 Basings ; Cantilevers; Continuous Girders; Lattice Girders; Girders with Vertical 

 Struts and Diagonal Ties ; Calculation of the Strains on Ditto ; Bow and String 

 Girders ; Girders of a form not belonging to any regular figure ; Plate Girders ; Ap- 

 portionments of Material to Strain ; Comparison of different Girders ; Proportion of 

 Length to Depth of Girders ; Character of the Work ; Iron Roofs. 



Construction of Iron Beams, Pillars, &c. 



IRON AND HEAT, Exhibiting the Principles concerned in the 

 Construction of Iron Beams, Pillars, and Bridge Girders, and the 

 Action of Heat in the Smelting Furnace. By JAMES ARMOUR, 

 C.E. Woodcuts, I2mo, cloth boards, 3-r. 6d. ; cloth limp, 2s. 6d. 



[Recently piiblished. 



" A very useful and thoroughly practical little volume, in every way deserving of 

 circulation amongst working men." Mining Journal. 



" No ironworker who wishes to acquaint himself with the principles of his own 

 trade can afford to be without it." South, Durham Mercury. 



Power in Motion. 



POWER IN MOTION : Horse Power, Motion, Toothed Wheel 

 Gearing, Long and Short Driving Bands, Angular Forces, &c. 

 By JAMES ARMOUR, C.E. With 73 Diagrams. I2mo, cloth 

 boards, 3*. 6d. [Recently published. 



" Numerous illustrations enable the author to convey his meaning as explicitly as 

 it is perhaps possible to be conveyed. The value of the theoretic and practical know- 

 ledge imparted cannot well be over estimated. " Newcastle Weekly Chronicle. 



Metallurgy of Iron. 



A TREATISE ON THE METALLURGY OF IRON : con- 

 taining Outlines of the History of Iron Manufacture, Methods of 

 Assay, and Analyses of Iron Ores, Proces es of Manufacture of 

 Iron and Steel, &c. By H. BAUERMAN, F.G.S., Associate of the 

 Royal School of Mines. With numerous Illustrations. Third 

 Edition, revised and much enlarged. I2mo., cloth boards, $s. 6d. 



\_Just published. 

 " Carefully written, it has the merit of brevity and conciseness, as to less important 



points, while all material matters are very fully and thoroughly entered into." 



Standard. 



Trigonometrical Siirveying. 



AN OUTLINE OF THE METHOD OF CONDUCTING A 

 TRIGONOMETRICAL SURVEY, for the Formation of Geo- 

 graphiaal and Topographical Maps and Plans, Military Recon- 

 naissance, Levelling, &c., with the most useful Problems in Geodesy 

 and Practical Astronomy, and Formulae and Tables for Facilitating 

 their Calculation. By LIEUT-GENERAL FROME, R.E., late In- 

 spector,- General of Fortifications, &c. Fourth Edition, Enlarged, 

 thoroughly Revised, and partly Re-written. By CAPTAIN CHARLES 

 WARREN, R.E., F.G.S. With 19 Plates nnd 115 Wcodcuts, 

 royal 8vo, price i6j. cloth. \_Just published. 



