4 WORKS IN ENGINEERING, SURVEYING, ETC., 



Humbers Great Work on Bridge Construction. 



A COMPLETE and PRACTICAL TREATISE on CAST and 

 WROUGHT-IRON BRIDGE CONSTRUCTION, including 

 Iron Foundations. In Three Parts — Theoretical, Practical, and 

 Descriptive. By William Humber, Assoc. Inst. C. E., and M. Inst. 

 M. E. Third Edition, revised and much improved, vidth 115 Double 

 Plates (20 of which now first appear in this edition), and numerous 

 additions to the Text. In 2 vols. imp. 4to, 6/. i6s. 6d. half-bound 

 in morocco. 



"A very valuable contribution to the standard literature of civil engineering. In 



addition to elevations, plans, and sections, large scale details are given, which very- 

 much enhance the instructive worth of these illustration'^. No engineer would wil- 

 lingly be without so valuable a fund of information." — Civil Ejigineer and Architect's 

 yournal. 



Mr. Humberts stately volumes lately issued — in which the most important bridges 

 erected during the last five years, under the direction of our most eminent engineers, 

 are drawn and specified in great detail" — En^7ieer. 



"A book — and particularly a large and costly treatise like Mr. Humber's — which 

 has reached its third edition may certainly be said to have established its own 

 reputation.' ' — E ngin eeriiig. 



Strai7ts,Formulœ & Diagrams for Calculation of. 



A HANDY BOOK for the CALCULATION of STRAINS 

 in GIRDERS and SIMILAR STRUCTURES, and their 

 STRENGTH ; consisting of Formulae and Corresponding Diagrams, 

 with numerous Details for Practical Application, &c. By William 

 Humber, Assoc. Inst. C.E., &c. Second Edition. Fcap. 8vo, 

 with nearly 100 Woodcuts and 3 Plates, 'js. 6d. cloth. 



*' The arrangement of the matter in this little volume is as convenient as it well 



could be The system of employing diagrams as a substitute for complex 



computations is one justly coming into great favour, and in that respect Mr. Humber's 

 volume is fully up to the times." — Engineering: 



"The formulae are neatly expressed, and the diagrams good." — Athenœum. 



" Mr. Humber has rendered a great service to the architect and engineer by pro- 

 ducing a work especially treating on the methods of delineating the strains on iron 

 beams, roofs, and bridges by means of diagrams." — Builder. 



Barlow on the Strength of Materials^ enlarged. 



A TREATISE ON THE STRENGTH OF MATERIALS, 

 with Rules for application in Architecture, the Construction of 

 Suspension Bridges, Railways, &c. ; and an Appendix on the 

 Power of Locomotive Engines, and the effect of Inclined Planes 

 and Gradients. By Peter Barlow, F.R.S. A New Edition, 

 revised by his Sons, 'P. W. Barlow, F.R.S., and W. H. Barlow, 

 P'.R.S., to which are added Experiments by HODGKINSON, Fair- 

 Bairn, and Kirkaldy ; an Essay (with Illustrations) on the effect 

 produced by passing Weights over Elastic Bars, by the Rev. 

 Robert Willis, M.A., F.R.S. And Formulae for Calculating 

 Girders, &c. The whole aiTanged and edited by W. Humber, 

 Assoc. Inst. C.E., Author of " A Complete and Practical Treatise 

 on Cast and Wrought-Iron Bridge Construction," &c. 8vo, 400 

 pp., with 19 large Plates, and numerous woodcuts, i8j". cloth. 



*' The book is undoubtedly worthy of the highest commendation." — Miningjoumal. 

 "The best book on tne subject which has yet appeared. • -, . • We know of 

 no work that so completely fulfils its mission." — English Mechanic. 

 **Tb€ standard treatise upon this particular subject." — Engittecr. 



