November 19, 1914] 



NATURE 



Zoy 



the chapters devoted to insects, however, there 

 are signs of want of touch between authors and 

 artist. In the chapter on "Butterfly FH^ht " 

 there is a drawings of a " Fritillary," which repre- 

 sents the plant, not the insect of that name; the 

 "Little Blue resting:," on p. 35, appears to have 

 been drawn from a "Common Blue," while the 

 "Female Emperor," on p. 104, is unmistakably 

 Arctia caia, the "Common Tiger" moth. Such 

 slips as these can, however, be easily rectified in 

 a new edition. O. H. C. 



PR A CriCA L DRA WING. 

 (i) -4 Manual of Mechanical Drawing. By J. H. 



Daler.. Pp. xii+i8i. (Cambridg-e University 



Press, 1914.) Price 35. net. 

 (2] Machine Construction and Draiving. Book ii. 



By A. E. Ingham. Pp. xii+i8o. (London: 



G. Routledge and Sons, Ltd., 1914.J Price 



3i-. net. 



THE titles of these two books have been well 

 chosen; in one the chief concern of the 

 author is to ensure manipulative skill in instru- 

 mental drawing, and in the other to illustrate 

 details of engineering construction. 



(i) Those readers who take Mr. Dales as their 

 j^niide will undergo a process of careful drilling 

 in the use and maintenance of the scale, square, 

 pencil, pen, and compass, by means of specially 

 designed and carefully graduated sets of exercises, 

 largely geometrical in character, followed by ex- 

 amples of the projection of various machine details, 

 and completed by the preparation of a full set 

 of working drawings of a screw-cutting lathe, 

 fully dimensioned, with titles and descriptions, all 

 executed in the style of the skilled professional 

 draughtsman. Thus the book gives a course 

 of organised training in the draughtsman's craft, 

 valuable especially to students who afterwards 

 enter a drawing office, for they will be ready to 

 begin elementary design or other good work at 

 once. 



(2) Mr. Ingham has previously written an 

 elementary book on the subject, and the present 

 ^olume is intended as a continuation, suitable for 

 more advanced students. It gives, with descrip- 

 tions and simple calculations, a large number of 

 well-selected examples representing modern en- 

 gineering practice, arranged and classified in 

 seven chapters headed respectively, " Power 

 Transmission Appliances," "Gearing," "Steam 

 Kngines and Turbines," "Gas and Oil Engines," 

 "Boilers and Fittings," "Machine Tools and 

 Appliances," "Pumps and Compressors." The 

 drawings are well printed and thoroughly work- 

 manlike and have evidently been prepared by a 

 NO. 2351, VOL. 94I 



highly qualified expert. The student's progress 

 is tested from time to time by sets of suggestive 

 examples in drawing, calculation, and design. 

 The text-book is a very good example of its kind, 

 and will give satisfaction wherever adopted. 



OUR BOOKSHELF. 



Essays and Addresses. By the late Prof. James 

 Campbell Brow n. Pp. x + 208. (London : 

 J. and A. Churchill, 1914.) Price 55. net. 

 Mr. Henry H. Brown, who edits this volume, 

 explains in the preface that this selection of essays 

 and addresses has been published because of the 

 many requests for copies of particular papers by 

 the late Prof. Brown which Mrs. Campbell Brown 

 has received but was unable to accede to because 

 most of the essays had never been printed. 



The papers are arranged in chronological order, 

 and most of them are concerned with various 

 aspects of pure and applied chemistry. The first, 

 on technical chemistry, was the chairman's address 

 to the Liverpool section of the Society of Chemical 

 Industry, and was delivered in November, 1886. 

 The last essay, on science applied to the detection 

 of crime, was an address to the chemical, physical, 

 and legal societies at the L'niversity of Liverpool 

 in 1908. The scope of the volume can be gathered 

 from the titles of some of the other papers : the 

 ethics of chemical manufacture, a French view 

 of German industries, the use and abuse of 

 hypothesis, and chemistry as a profession. 



The papers have been printed as nearly as 

 possible in the shape in which they were delivered, 

 and will be welcomed by their author's old pupils 

 and friends, who will recognise many characteristic 

 touches. 



The Happy Golfer. Being some Experiences, Re- 

 flections, and a few Deductions of a Wandering 

 Player. By H. Leach. Pp. vii + 414. (Lon- 

 don: Macmillan and Co., Ltd., 1914.) Price 

 6s. net. 

 This is a brightly written book, full of the free 

 air of the links and the sweet philosophy of the 

 man who enjoys the simple life of the natural 

 athlete. The author discovers in golf seven 

 wonders, the fascination that grips, the traditions 

 which never stale in the telling, the ubiquity of 

 the game, St. Andrews the sacred Mecca of every 

 golfing soul, the tragedy of the short putt, the 

 three mighty men who share fifteen open cham- 

 pionships among them, and the marvellous 

 amateur eight times champion, and, lastly, the 

 romance of the rubber-cored ball. On these as 

 texts he dilates and prattles, then takes us all 

 round the world searching for happy golfing 

 hunting-grounds, returning finally to the best 

 heaven-given links of the dear homeland. He 

 talks of players and matches, of temperament and 

 style, of courses and hazards. When he touches 

 on what is generally called the science of the game 

 he speaks wisely and not dogmatically. Not a 

 single illustration of stance or grip disturbs the 

 literary glamour of the page ; and the mysteries 



