WORKS PUBLISHED BY LOCKWOOD & CO. 21 



MATHEMATICS, &c. 



Gregory s Practical Mathematics. i 



MATHEMATICS for PRACTICAL MEN ; being a Common- 

 place Book of Pure and Mixed Mathematics. Designed chiefly 

 for the Use of Civil Engineers, Architects, and Surveyors. Part I. 

 PURE MATHEMATICS comprising Arithmetic, Algebra, Geometry, 

 Mensuration, Trigonometry, Conic Sections, Properties of Curves. 

 Part II. MIXED MATHEMATICS comprising Mechanics in general, 

 Statics, Dynamics, Hydrostatics, Hydrodynamics, Pneumatics, 

 Mechanical Agents, Strength of Materials. With an Appendix of 

 copious Logarithmic and other Tables. By OLINTHUS GREGORY, 

 LL.D., F.R. A.S. Enlarged by HENRY LAW, C.E. 4th Edition, 

 carefully revised and corrected by J. R. YOUNG, formerly Profes- 

 sor of Mathematics, Belfast College; Author of "A Course of 

 Mathematics," &c. With 13 Plates. Medium 8vo, I/, is. cloth. 



" As n standard work on mathematics it has not been excelled." Artizan. 



" The engineer or architect will here find ready to his hand, rules for solving nearly 

 every mnthevnatical difficulty that may arise in his practice. As a moderate acquaint- 

 ance with arithmetic, algebra, and elementary geometry is absolutely necessary to the 

 proper understanding of the most useful portions of this book, the author very wisely 

 has devoted the first three chapters to those subjects, so that the most ignorant may be 

 enabled to master the whole of the book, without aid from any other. The rules are in 

 all cases explained by means of examples, in which every step of the process is clearly 

 worked out." Builder. 



' ' One of the most serviceable books to the practical mechanics of the country. . 

 The edition of 1847 was fortunately entrusted to the able hands of Mr. Law, who 

 revised it thoroughly, re-wrote many chapters, and added several sections to those 

 which had been rendered imperfect by advanced knowledge. On examining the various 

 and many improvements which he introduced into the work, they seem almost like a 

 new structure on an old plan, or rather like the restoration of an old ruin, not only to 

 its former substance, but to an extent which meets the larger requirements of modern 



times In the edition just brought out, the work has again been revised by 



Professor Young. He has modernised the notation throughout, introduced a few 

 paragraphs here and there, and corrected the numerous typographical errors which 

 have escaped the eyes of the former Editor. The book is now as complete as it is 



possible to make it We have carried our notice of this book to a greater 



length than the space allowed us justified, but the experiments it contains are so 

 interesting, and the method of describing them so clear, that we may be excused for 

 overstepping our limit. It is an instructive book for the student, and a Text- 

 book for him who having once mastered the subjects it treats of, needs occasionally to 

 refresh his memory upon them." Building News. 



The Metric System. 



A SERIES OF METRIC TABLES, in which the British 

 Standard Measures and Weights are compared with those of the 

 Metric System at present in use on the Continent. By C. H. 

 DOWLING, C. E. Second Edition, revised and enlarged. 8vo, 

 icxr. 6d. strongly bound. 



"Mr. Bowling's Tables, which are well put together, come just in time as a ready 

 reckoner for the conversion of one system into the other." Atherueum. 



" Their accuracy has been certified by Professor Airy, the Astronomer-Royal." 

 Builder. 



" Resolution 8. That advantage will be derived from the recent publication of 

 Metric Tables, by C. H. Dowling, C.E." Report of Section F, British Association, 

 Bath. 



