365 



scope for genuine photo-micrographic work without the use of a 

 microscope, and even without microscopic objectives. To be sure, 

 this is only true for very low power work, but the point is well 

 worth remembering. In dealing with medium and high power 

 photo-micrography, the author gives simple directions for setting 

 up the microscope and camera which will no doubt be helpful to 

 those approaching the subject for the first time, but the beginner 

 will, of course, not go very far before feeling the need of some- 

 thing more than the " First Steps " in these matters. Incident- 

 ally Mr. Duncan strongly recommends acetylene gas as an 

 illuminant for high power work, as he considers it to be in several 

 respects superior to lime light. The second half of the book deals 

 with developing and printing, the preparation of objects, and 

 stereo-photo-micrography. The latter is a branch of photo- 

 micrography which it is certainly well to call attention to, but it 

 seems rather a pity that such subjects as developing of negatives 

 and mounting of objects should have been included when the 

 space could have been so much more profitably devoted to the 

 main purpose of the book. D. J. S. 



Manuel Pratique de Bacteriologie, Parasitologic, XJrologie, 

 Anatomie Pathologique. By Dr. Petit and G: Borne, 7| x 

 4| in. 235 pages, 47 figures in the text. Paris, 1902 : 

 C. Naud. Price 3 francs. 



Although written expressly for the use of candidates for the 

 French doctor's degree, this book should also, if its limitations are 

 borne in mind, prove useful to many who require a condensed 

 account of the principal facts concerning the somewhat wide 

 range of subjects with which it deals. In the first of the four 

 principal divisions of the work, the authors review the general 

 methods of bacteriological research, and give short descriptions of 

 some of the best known disease-producing bacteria, such as those 

 of cholera, typhoid, anthrax, etc. The animal and vegetable 

 parasites found constantly or occasionally in or on the human 

 body are next very briefly dealt with, and then, under the heading 

 of " Urologie," a fairly exhaustive account is given of the methods 



JouRN. (^. M. C, Series II.— No. 51. 24 



