PREFACE. 



THIS volume has been prepared with a view of aiding the instruc- 

 tors and students of the laboratory classes which are under my 

 direction. 



It is also presented with the hope that it may be useful to other 

 instructors. 



Again, students often wish to continue microscopical work during 

 the interim of college attendance ; to such, it is my belief, these 

 pages will have some value. 



Still again, very many practitioners, not having had, during 

 pupilage, advantages equal to those provided by the modern 

 laboratory equipment, wish to acquire more knowledge of micro- 

 scopy, for its value in practical medicine. To such workers, also, 

 I desire to be useful. 



So much technique has been introduced as has been found to be 

 of absolute necessity, and no more. The processes for the prepara- 

 tion and exhibition of tissues are generally simple and always prac- 

 ticable. 



In the description of organs, I assume the student has a fair 

 knowledge of gross anatomy, but knows nothing of histology. The 

 scheme or plan of the structure is first described using diagrams 

 where requisite to clearness after which the mode of preparing the 

 section is indicated, and, under practical demonstration, every 

 histological detail tabulated in proper order. The drawings will, 

 I believe, aid in the recognition of such elements in the field of the 

 microscope. 



The illustrations are exact reproductions, by photography, of my 

 own pen-pictures ; and distinction must always be made between the 

 drawings which are schematic 'Used to emphasize the plan of struc- 

 tures and those drawn from the tissue as seen in the microscope. 



Our literature abounds in excellent works for the advanced 



