1869.J Engineering — Civil and Mechanical. 437 



Literature. 



* A Treaties on Lathes and Turning, Simple, Mechanical, and 

 Ornamental,'* by W. Henry Northcote. This work is calculated 

 to prove a useful addition to the mechanical engineer's hbrary, and 

 will be referred to with interest by both professional men and ama- 

 teurs. It is divided into foiu* parts. The first part contains a 

 general description of the difterent kinds of lathes in general use, 

 with a statement of the points which constitute a good lathe, and 

 a glossary of the technical terms in general use by turners. The 

 second part treats of the use of the hand lathe, and it comprises 

 five di\asions, relating to plain turning with hand tools, hand 

 turning in metals, screw chasing, drilling and boring, and miscel- 

 laneous operations. The thu-d part enters into a description of a 

 "multi-purpose" lathe designed by Mr. Northcote himself; and 

 this is followed by remarks on self-acting traverse and surface 

 turning, self-acting screw cutting, self-acting drilling and boring, 

 turning irregular shapes, wheel cutting, milling or circular cutter 

 maldiig, fluting or grooving, facing and slot-drilling, planing and 

 slotting, and on attention to lathe, repairing tools, &c. And the 

 fourth part enters into particulars on the subject of ornamental 

 turning. 



' The Elasticity, Extensibility, and Tensile Strength of Iron 

 and Steelj't by Knut Styfle, Director of the Koyal Technological 

 Institute at Stockholm. Translated from the Swedish, with an 

 original Appendix, by Chester P. Sandberg, A.I.C.E. With a 

 Preface by John Percy, M.D,, F.K.S.. This volume is the result 

 of certain ex|)eriments recently made by its author. It contains a 

 full account of those experiments and of the apparatus by the aid 

 of which they were carried out. The subject is di\ided into four 

 chapters: the first, treating of experiments on tension at ordinary 

 temperatures ; the second, on the apphcation of the results of these 

 investigations to the determination of the relative values of steel 

 and iron, and of the different varieties of these materials for various 

 purposes; the third, of experiments on tension at high and low 

 temperatures ; and the fourth, of experiments on flexion at diflerent 

 degrees of temperature. To these chapters are also added certain 

 tables and plates, and an Appendix by Mr. Sandberg. The record 

 of these experiments forms a valuable addition to the information 

 obtained by Mr. Kirkaldy on the same subject ; much, however, 

 yet remains to be done in the matter of iron and steel testing, and 

 it is to be hoped that further experiments will be undertaken, with 

 the view of arriving at conclusions upon those points which do not 

 as yet appear to have been satisfactorily settled. 



* Loiigmaus, Greeu, «& Co., Loudon. t Joliu MuiTuy, Loudou. 



