V1H PREFACE. 



For the flattering notice taken of this work by the medical 

 and scientific journals, the author is under many obligations, 

 many prominent periodicals having spoken of it in terms of the 

 highest praise. 



It has formed no part of the design of this book to describe 

 the mechanical arrangements of different instrument-makers; 

 yet sufficient directions have been given to enable any one pos- 

 sessed of a microscope, of any mechanical form and arrange- 

 ment, to use it to the best advantage. , Whatever be the 

 favorite pursuit of the student, whether Botany, Zoology, 

 Anatomy, Physiology, or Pathology, the present manual gives 

 information, by means of which the microscope may be profit- 

 ably employed. In addition to this, the chapters on Minute 

 Dissection, Injection, &c., will be of interest to many. 



