6 WORKS PUBLISHED BY LOCKWOOD & CO. 



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, 

 F.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 Formula for Calculating 

 Girders, &c. The whole arranged and edited by W. HUMBER, 

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

 on Cast and Wrought-Iron Bridge Construction," &c. &c. Demy 

 8vo, 400 pp., with 19 large Plates, and numerous woodcuts, price 

 l&r. cloth. 



" Although issued as the sixth edition, the volume under consideration is worthy of 

 being regarded, for all practical purposes, as an entirely new work . . . the book 

 is undoubtedly worthy of the highest commendation." Mining Journal. 



"An increased value has been given to this very valuable work by the addition of 

 a large amount of information, which cannot prove otherwise than highly useful to 



those who require to consult it The arrangement and editing of this 



mass of information has been undertaken by Mr. Humber, who has most ably fulfilled a 

 task requiring special care and ability to render it a success." Mechanics' Magazine. 



" The best book on the subject which has yet appeared We know of 



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



"There is not a pupil in an engineering school, an apprentice in an engineer's or 

 architect's office, or a competent clerk of works, who will not recognise in the scientific 

 volume newly given to circulation, an old and valued friend." Building- News. 

 " The standard treatise upon this particular subject." Engineer. 



Strains, Formula & 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. Fcap. 8vo, with nearly 100 

 Woodcuts and 3 Plates, price 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 1 . 



"The formulae are neatly expressed, and the diagrams good." AtJien&um. 

 "We heartily commend this really Jiandy book to our engineer and architect 

 readers. " English Mechanic. 



Mechanical Engineering. 



A PRACTICAL TREATISE ON MECHANICAL ENGI- 

 NEERING : comprising Metallurgy, Moulding, Casting, Forging, 

 Tools, Workshop Machinery, Mechanical Manipulation, Manufac- 

 ture of the Steam Engine, &c. &c. With an Appendix on the 

 Analysis of Iron and Iron Ore, and Glossary of Terms. By FRANCIS 

 CAMPIN, C.E. Illustrated with 91 Woodcuts and 28 Plates of 

 Slotting, Shaping, Drilling, Punching, Shearing, and Riveting 

 Machines Blast, Refining, and Reverberatory Furnaces Steam 

 Engines, Governors, Boilers, Locomotives, &c. Svo, cloth, I2J. 



