i9o SCIENCE PROGRESS 



Marine Engineering. By Engineer-Captain A. E. Tompkins, Royal Navy 

 (Retired). [Pp. ix + 812.] (London: Macmillan & Co., 1914. Price l$s. 

 net.) 



This work is pre-eminently of a practical character, covering in a very satisfactory 

 manner the whole range of machinery usually coming under the care of marine 

 engineers. 



The various organs of a ship are described, and their action explained in 

 clear and readable style, inspiring the reader with confidence as to the practical 

 acquaintance of the author with the machines he deals with. 



Adequate treatment is given to the more recent developments of marine 

 engineering, namely, the use of the steam turbine and various types of internal 

 combustion engines. 



The chapter on Steam Turbines is particularly well arranged, and the writer 

 may be, in this instance, forgiven his excursion into the history of a subject about 

 which, at present, very little has been written ; though there is little justification 

 for the introductory matter on the early development of the steam engine, or 

 on definitions and units, or on the elementary thermo-dynamics of heat engines, 

 concerning all of which there is already a wealth of able literature. 



The book includes a very detailed section on the various kinds of marine 

 boilers, embodying much useful information on the several types of water-tube 

 boilers now in use in the Royal Navy. 



There is a section on combustion, which brings out the great importance of 

 this process on the economy of working, and includes a chapter on the com- 

 bustion of liquid fuel, which is now becoming more and more general, especially 

 on the ships of the Royal Navy. 



The reciprocating steam engine receives careful attention in every particular, 

 and all its immediate auxiliaries are given due consideration. 



The chapter on indicator diagrams strikes one as being extremely useful, 

 developing as it does the uses of this instrument for detecting the nature of 

 the trouble with faulty engines. 



The screw propeller is described, the author, in this case, wisely confining 

 himself to practical matters and common phenomena, leaving all but the very 

 elementary theory to more specialised works. 



The auxiliary machinery, other than that employed in actual propulsion, is well 

 treated, so that an engineer reader has in this work a good deal of information 

 on the ever-increasing and varied auxiliaries which come under his charge, such 

 as electrical generating sets, steering gears, refrigeration plant, etc. 



In conclusion, it may be said that this volume may be thoroughly recom- 

 mended to every marine engineer, whether he be a naval man or in the merchant 

 service, as a sound and readable work. 



Malaria : Etiology, Pathology, Diagnosis, Prophylaxis, and Treatment, by 

 Graham E. Henson, M.D., with an Introduction by Prof. Charles 

 C. Bass, M.D. [Pp. 190 and 27 Illustrations.] (St. Louis: C. V. Mosby 

 Company, 19 13.) 



The literature of Malaria is so very large that it is impossible to write a complete 

 text-book upon the subject except at great length. At the same time short text- 

 books are useful for medical men and sanitarians who come only occasionally into 

 contact with the disease ; and Dr. Henson's little work is extremely useful for this 

 purpose. It gives a good resume of most of the important departments of the 



