NOTICES OF BOOKS. ix 



We see no reason to suppose that such infection is in any way im- 

 possible. 



In the chapter on Treatment the main points to be observed and 

 the best means of deahng with the more common forms of disease 

 are set forth with admirable clearness. The instructions given are 

 sufficiently full to enable the practitioner always to relieve pain and 

 in almost all cases to do sufficient in the way of stopping the 

 decaj'ed teeth to ensure their preservation until such time as a 

 dental surgeon can be consulted. Stress is laid upon the importance 

 of recognising the first permanent molar from its neighbouring 

 temporary teeth, as, whilst the latter have only to serve their pur- 

 pose till about the twelfth year, the former has to last the child 

 through life. 



In the matter of extraction of teeth, directions are given for the 

 effectual removal of the various teeth from the upper and lower jaw, 

 and those cases are indicated in which this drastic treatment is 

 absolutely necessary. 



The book ends with a short article on Tartar and its removal. 



We wish cordially to recommend this work of 260 pages, not 

 merely on account of the clear and concise manner in which it is 

 written, but also because of the immense importance to the comfort 

 and well-being of the community of the matters of which it treats. \ 

 Indeed, we regard it as a book which no general practitioner can 

 afford to be without. 



A New Course of Experimental Chennstry. By John Castell-Evens, 

 F.I.C. Thomas Murby. Price 2s. 6d. 



This book consists of three parts. Part I. (pp. i to 96) is a mix- 

 ture of arithmetical problems and elementary chemical experiments, the 

 experimental work only occupying thirty-three pages. So curiously is 

 this mixture compounded, that on casually turning over the pages one 

 might almost fancy that by mistake a few stray leaves of some elemen- 

 tary practical chemistry had got accidentally bound up among the sheets 

 of a book of arithmetical problems. There appears to be little connec- 

 tion between the experiments and the problems; thus, pages 17 to 24 con- 

 tain physical problems on specific gravity, specific heat, latent heat, 

 heat and work. These eight pages are followed by three pages of prac- 

 tical matter, consisting of a few experiments designed to show the com- 

 position and properties of water. Then come eight more pages of 

 physical problems, including exercises on the dynamical theory of gases, 

 in the middle of which there is sandwiched a single page containing 

 four more experiments on water. 



Of the problems themselves little need be said ; most of these will 

 be useful exercises for the student. Some, however, are a little ambigu- 

 ous ; e.g.: "Four grains of iridium at 1400° C. are put into 100 grains 

 of mercury at 10° ; what will be the result ? " (p. 64). 



