2 INTRODUCTION 



aorta. If care is taken that no blood is lost the 

 arteries will be filled with the injection mass, the 

 veins with hardened blood. 



The cat's heart and eye will answer for general 

 dissection, but it will be found convenient to sub- 

 stitute the heart and eye of the pig for more ex- 

 tended study. These can be easily obtained from 

 the slaughter-house. The description here given 

 of the heart and eye of the cat serves equally well 

 for the pig, with the exception that the tapetum 

 is wanting in the latter animal. 



Each student should be provided with the un- 

 mounted bones of one specimen for the work of 

 the first chapter. Each of the remaining chapters 

 really requires a fresh and complete animal, though 

 with the exercise of considerable care it is possible 

 to study both circulatory and nervous systems 

 from a single specimen. At least three animals, 

 then, are necessary. 



Minute directions for dissection often retard the 

 student more than they aid him, and in this guide 

 only the general method is indicated. The inge- 

 nuity of the student, directed by the instructor, will 

 suggest the details. For more exhaustive works on 

 the anatomy of the cat, the student is referred to 

 " Anatomical Technology," by Wilder and Gage, 

 " The Cat," by Mivart, " Mammalian Anatomy," 

 Vol. I., "The Skeleton of the Cat," by Jayne, and 

 "Anatomy of the Cat," by Reighard and Jennings. 



The figures are diagrammatic, but will serve to 



