754 



THE POPULAR SCIENCE MONTHLY 



the best contrivance being stated as the 

 following: It consists of a double coffee- 

 pot, the inner one, containing the coffee and 

 water, being completely surrounded by steam 

 which is generated in a pan or receiver, 

 over which is placed the coffee-pot. In 

 this way all the rich, oily aromas are thor- 

 oughly extracted by the action of steam- 

 heat surrounding all parts of the inner ves- 

 sel. The coffee can never boil, and the 

 result is a beverage more perfect than any 

 percolating, boiling, or straining process 

 has ever produced. 



A chapter is devoted to the analysis and 

 adulterations of coffee, and the volume con- 

 tains a beautiful colored frontispiece repre- 

 senting the coffee-plant, and a map showing 

 its geographical distribution. The work is 

 very neatly gotten up. 



The Ten Laws of Health ; or, LTow Dis- 

 ease IS PRODUCED AND CAN BE PRE- 

 VENTED. By J. R. Black, M. D. Phila- 

 delphia : J. B. Lippincott & Co., 1872. 



In another part of this number of the 

 Monthly, the reader will find an interesting 

 paper from Dr. Black, on "Applied Sanitary 

 Science," in which, after pointing out some 

 of the more formidable difficulties obstruct- 

 ing a general application of sanitary rules, he 

 urges, as the only effective means of making 

 these rules universally available, that every 

 intelligent member of the community master 

 the leading facts and principles of the sub- 

 ject. In this way his eyes will be opened 

 to the dangers which surround him, and 

 the knowledge necessary to their avoidance 

 or removal will also be at hand for practical 

 use. To this important educational work 

 the book before us is a valuable contribu- 

 tion. The author begins by enforcing the 

 proposition, with which most intelligent 

 physicians will doubtless agree, that dis- 

 eases are, as a rule, preventible ; that man 

 brings them upon himself through ignorance 

 and carelessness, and that most of them 

 may be avoided by conforming to certain 

 well-ascertained laws of health. These laws 

 he ranges under ten heads, in the order of 

 their importance, and then considers each 

 in a threefold manner : the various ways in 

 which it is commonly violated are first 

 pointed out ; the results which follow are 

 next indicated ; and, lastly, comes a descrip- 



tion of the ways and means necessary to its 

 proper observance. "With some slight ex- 

 ceptions, the matter of the book is emi- 

 nently sound, and its precepts safe to follow, 

 while the style is clear and vigorous, quali- 

 ties which, united with the excellence of its 

 mechanical get-up, admirably fit it for popu- 

 lar reading. 



Administration of Justice under Military 

 and Martial Law. By Charles M. 

 Clode. London : Murrav. New York : 

 Scribner, 1872. 



A royal commission in England, some 

 time since, expressed a desire for some such 

 work as the present, and the British War 

 Department have made an acquaintance 

 with military law an essential condition of 

 promotion in tne army. It is therefore 

 plain that this work meets a want in Eng- 

 land ; and, as the United States Army is 

 governed by a code remodelled on the basis 

 of the British Mutiny Act, military men on 

 this side of the Atlantic will probably find 

 these pages valuable for reference. 



Lectures on Light. Delivered in the 

 United States, in the Winter of 1872-73. 

 By Prof. John Tyndall, LL. D., F. R. S. 

 196 pages. D. Appleton & Co. 



In his address at the farewell banquet, 

 Prof. Tyndall said : " On quitting England, 

 I had no intention of publishing the lectures 

 I have given here, and, except a fragment 

 or two, they were wholly unwritten when I 

 arrived in this city. Since that time, be- 

 sides lecturing in New York, Brooklyn, and 

 New Haven, the lectures have been written 

 out. No doubt many evidences of the ra- 

 pidity of their production will appear ; but 

 I thought it due to those who listened to 

 them with such unwavering attention, as 

 also to those who wished to hear them, but 

 were unable to do so, to leave them behind 

 me in an authentic form." Many thousands 

 who listened to these lectures, and many 

 more thousands who did not, will be grate- 

 ful to Prof. Tyndall for having written them 

 out so fully for general perusal. Accom- 

 panied as they are with numerous illustra- 

 tions of apparatus and experiments, and 

 written in the author's vivid and graphic 

 way, they will interest the reader almost as 

 much as they did those who heard them. 



These lectures were undoubtedly pre- 



