IV SCIENCE PROGRESS. 



technique of healing. On the contrary, by the volume before us the 

 whole scientific basis of medicine is introduced. How a student giving 

 a fraction of his time for a year can be supposed to conscientiously 

 master its contents is a matter that will strike any practical person 

 who turns over the pages of the book. The ordinary student cannot 

 possibly do so, and a change must be made for him. When it is. 

 nor is it apparently long distant, we hope Prof. Waller's Human 

 Physiology will even more generally come into use than at present. The 

 book is largely read already we know by University students, but it 

 is not sufficiently used or examined upon in the hospital medical 

 schools because there diploma students are in the majority. The 

 volume is capitally illustrated. The figures are for the most part 

 original, and even of those borrowed not a few have received signal 

 improvements for a teaching purpose, e.g., Goldscheider's, fig. 262. 



No flattery can be more sincere than that which takes the form of 

 imitation. The influence which this text-book, since the appearance 

 of its first edition several years ago, has exercised on English physio- 

 logical manuals must, to its author, have been amusing if no more. 

 The result has been most beneficial to our students. We congratulate 

 him on having borne his pleasure in silence. 



It is difficult to single out passages for special commendation. 

 Did we attempt it, one taken would be the summary of hypnosis, only 

 four pages long, and yet containing everything wanted. Occipito-retinal 

 correspondence, and the masterly paragraph on the place of psycho- 

 logical terms in physiology, would be others. The whole chapter on 

 animal heat is very excellent. Reference might with advantage be 

 made to Dr. Haldane's gravimetric method of estimation of the 

 respiratory exchange. Have the pages been re-indexed for this 

 edition ? We would also urge the addition of a centimetre scale 

 to the measures given in the appendix. It is not easy to realise 

 the difficulty which the English student has in visualising the to him 

 still unfamiliar metric units. 



We believe that a French translation from the present edition has 

 been undertaken by Professor Herzen of Lausanne and will be published 

 by MM. Masson, Paris. 



In conclusion, we repeat that this Introduction to Human Physio- 

 logy is, of all the manuals of moderate size which we know on the 

 subject, the best. It is wholly admirable. We hope it will succeed 

 more and more in displacing other and smaller text-books from the 

 field, for its victory will be a reliable sign of educational progress in 

 this country. 



The Calculus for Engineers. By John Perry, M.E., D.Sc, F.R.S. 



Edward Arnold. Price, ys. 6d. 



This book cannot fail to prove of great use to a large class of 

 readers. In his introductory remarks the author states that he writes 



