1894 THE MICROSCOPE. 47 



The more difficult technicalities are simplified by the aid of 103 

 illustrations, mostly original with the author, which gives a 

 freshness to the pages rarely met with in books on this subject. 

 Although it was written as a guide to laboratory students or a 

 "textbook on the microscope," it contains such a marvellous 

 amount of concise information on the mechanism of the micro- 

 scope that it is worthy of a place among the reference books of 

 science. 



This book is written by a man of high scientific attainments 

 who is at the same time a devoted teacher. On this account 

 every sentence has been weighed in two balances, first the one 

 of exact truthfulness from a critical scientific standpoint and 

 secondly the one of expression. This careful consideration of 

 the Author has resulted in the production of an almost ideal 

 guide to assist his and other students in acquiriog those details 

 in the knowledge of the microscope which he himself has la- 

 bored so diligently to master. It is a text book that will aid 

 the beginner and assist the teacher. To be sure most of the 

 topics can be found more or less perfectly treated elsewhere, but 

 so scattered and voluminous is the literature on the microscope 

 that none but a master could select the " valuable from the 

 worthless " and bring together all that is essential in a work of 

 this size. 



There are other works on the microscope more pretentious 

 than this, but no other single book thus far written can take 

 the place of this little volume in the library of the student, 

 teacher, or physician who desires to know " how to use the mi- 

 croscope." It is written to instruct and consequently all ne- 

 cessary details are considered at length but in proportion to 

 their importance. It is in the clear exposition of those details 

 which are too frequently overlooked in works on the microscope 

 that much of its excellence lies. The fact that in this little 

 volume a teacher or student can find instruction on the sim- 

 plest as well as the most profound technical part of a micro- 

 scope and careful directions for the proper use of this instru- 

 ment renders it one of the most practical books ever written on 

 this subject. It is indispensible for the amateur and a most 

 valuable aid for the student of science or medicine in the ac- 

 quiiement of a thorough, practical, knowledge of the use of the 

 microscope. — V. A. M. 



