Vlll PREFACE. 



istence. To give directions respecting most approved 

 methods, and to classify the most important facts, has 

 required labor, which it is hoped will result in rendering 

 the work a necessary companion to the student, and an 

 aid to the progress of real science. 



Many of the figures illustrating the lower forms of life, 

 and normal and pathological histology, have been drawn 

 from the works of Carpenter, Beale, Frey, Strieker, Bill- 

 roth, and Rindfleisch, to which the more advanced stu- 

 dent is referred for further details. 



January, 1877. 



