24f, 



KNO\vi,i:i)(;i:. 



Jink. 1912. 



Aristotle's Rcsi-arclics in .Witiiral Sciciuw -IJy Thomas 



Kast Lones. M.A., LL.D. 274 pages. 10 illustrations. 



Sj-in.xSiln. 



(West, Newman & Co. Price 6 - not.) 



The fact tli.it si>nie of Aristotle's views arc held al the 



present day n'^''^ •' particniar interest to his work, and Pr. 



Lones deals with it in detail. 



Bush Days.— My .Amy E. Mack. 132 pages. 39 illustrations. 

 7.}-in.X6-in. 

 (The .Australian Book Co. Price 3/6 net.l 

 This little book consists of a number of short articles 

 dcalin!{ with the plants and animals of the bush wliich in the 

 neighbourhood of Sydney is rapidly K'^inf; way before bricks 

 and mortar, trams and trains. The pictures and the descrip- 

 tions deal, therefore, with matters on the other side of the 

 world, and cannot fail to .ittract and interest nature lovers in 

 the old country. 



Dictioiiary of Photography.— My K. J. Wail. F.R.P.S. 



738 pages. 71-in.X5-in. 



iHazell, Watson & Viney. Price 7 6 net.) 



A hundred new pages have been added to this the ninth 



edition of a most useful work, which is full of information, 



suggestions and valuable hints. 



The Oil and Broiiioil Processes. — By V. J. Mortimer and 

 S. L. CouLTHURST. 99 pages. S illustrations. 7-in.X5in. 

 (Hazell, Watson & Viney. Price 1 - net.) 

 The success which has attended Messrs. Mortimer and 

 Coulthurst's handbook is evidenced by the production of this 

 second and revised edition. 



The Doctor ,111,1 the People. — By H. UE Caki.e Woodcock. 



312 pages. 7J-in. X 5-in. 



(Methuen & Co. Price 6 - net.) 



The appearance of this book is most appropriate. It brings 

 before one the everyday life of the doctor, and many points 

 which the ordinary member of the comnmnity will do well to 

 study, while it is claimed that it exposes faults of raw legislation 

 which is the work of men who, though mature politicians, are 

 nevertheless ignorant of sociology. 



Zoology.— By Graham Kerr, F.R.S., F.X.S. 99 pages. 13 



illustrations. 6.j-in. X4j-in. 



IJ. M. Dent & Sons. Price 1 '• net.) 



.\ small primer when it gets into the hands of a young 

 person who is interested, very often produces results of which 

 the writer may well be proud. This little book seems intended, 

 however, rather to give a very brief outline of the animal 

 kingdom and the method of evolution for the adult enquirer. 



I'lir ,111, 1 .Afiaiiist Kxperiiiients on .Animals. — By STEPHEN 



Pack r. With ;m introduction by Lord Cromer. 344 pages. 



16 illustrations. 75-in.X5-in. 



(H. K. Lewis. Price 3/6 net.) 



We are glad to see that the word vivisection does not 



appear in the title of this book, and though there are some 



who, when they have once become biased against a matter, 



are not easily persuaded to look upon both sides of it, we 



would urge all those who pride themselves on being anti- 



vivisectionists to read Mr. Pagefs book and Lord Cromer's 



introduction to it. 



NOTICES. 



A REGULATOR FOR X-RAY TUBES. — In The 

 Archives of the Roentgen Ray for May, 191^, Dr. Gustav 

 Losse describes the air regulator for X-Ray bulbs which has 

 been perfected by Bauer. By its means a measured quantity 

 of air may be allowed to enter the; bulb. The advantages of 

 the invention are illustrated by Dr. Losse from his everyday 

 practice. Occasionally in damp or stormy weather he gets a 

 certain amount of reverse current from his coil which is very 

 deleterious to the life of the tube. The cure is a valve tube 

 which soon, however, becomes so hard that it has to be 

 regulated. To obviate the continuous annoyance of softening 

 this. Dr. Losse has preferred to put up with a reverse current. 

 The attachment, however, of a Bauer regul.itor has given him a 

 perfectly useful and practical instrument. The secret of 

 the production of a fine skiagram lies entirely in the choice of 

 rays of the appropriate degree of hardness. By adjusting 

 the hardness by means of Bauer's regulator we can obtain 

 plate after plate perfectly similar in appearance and e.xposure. 

 It is no longer a fault for an X-ray bulb to become rapidly 

 hard because this difficulty can now be easily overcome while 

 the reverse cannot. In the future, perhaps, the manufacturer 

 will advertise his X-Ray tubes as the best on the market, 

 because they become rapidly hard. 



BOOKS ON VOYAGES AND TRAVELS. — Messrs. 

 J. Wheldon & Company's catalogue issued under this title 

 includes a nmnlier of books on Australia and New Zealand, 

 and indeed many other countries abroad. 



THE VEGETATIVE CHILD.— English doctors have 

 pointed out before now that the puny boy is the outcome of 

 too little clothing. Dr. Mary Sutton (of New York Univer- 

 sity) contributes to The Child for May " a Biologic Study of 

 Early Child Life," and touches on the fact that during the 

 vegetative period of life the child has a relatively large 

 radiating surface to the body, and despite the more rapid 

 formation of much more heat in the child than in the older 

 individual, the vegetative infant has little power of resistance 

 and therein lies the danger of improper or inadequate 

 clothing. 



THE REMOVAL OF TESTS FROM FOSSILS.— In 

 The Naturalist for May, Mr. Buckman gives the following 

 directions for removing the tests from fossils (especially of 

 brachiopods of which natural casts are rarely met with). 

 Choose specimens which are not crystalline, and preferably 

 those which are likely to have a close grained hard internal 

 core. Heat them to redness (in a fire or preferably by means 

 of a Bunsen flame, spirit or blow-lamp) and drop them into 

 water. Much of the test will then fall off and the rest can be 

 detached by brushing or the delicate use of a pen-knife. 



ASSORTATIVE MATING IN MAN. — The statistical 

 facts brought forward by Dr. J. .-Vrthur Harris in the May 

 number of The Popular Science Monthly make it highly 

 probable that a great variety of physical and mental 

 characters influence human mating, and show that, on the 

 average, similar individuals tend to marry. Dr. Harris thinks 

 that his results will be received with much scepticism as the 

 "charm of the disparity" and " the selection of opposites" 

 has been so long asserted that the notion will not readily be 

 given up. He thinks that this scepticism m.iy be ignored, but 

 reminds his readers th.it popular beliefs often contain a scrap 

 of truth. 



BIBLIOTHIXA CHEMICO- MATHE.MATICA. — The 

 latest number of Messrs. Henry Sotheran & Company's 

 scientific catalogue contains the titles of upwards of two 

 thousand books deaHng with Mathematics, .Astronomy, and 

 kindred subjects, arranged imder the authors' names from the 

 letter " E " to " I." Those of our many readers who are in- 

 terested in these subjects should make a point of getting a copy. 



A HANDBOOK OF MARINE AQUARIA.— The notes 

 which have been issued on the A<iuaria in the Horniman 

 Museum. Forest Hill, have been entirely re-written. The 

 creatures dealt with are those which are generally to be found 

 in the Aquaria there. Rare forms are not included, as in 

 their case special labels are attached to the tanks when they 

 happen to be on view. This little handbook cannot fail to be 

 of great use to all students using the museum, audit costs but 

 a penny. 



