112 INTRODUCTION. 



is affected by light, as its colour and transparency ; 6th, its ana- 

 tomical composition and its texture, or the arrangement of its 

 integral parts; 7th, its properties and chemical composition; 

 8th, the liquids or humours it contains ; 9th, the properties it 

 enjoyed during life ; 10th, its vital actions, and the connexion 

 of this action with the others; llth, the varieties it presents in 

 the ages, sexes, races, and individuals ; 12th, its morbid states, 

 and 13th, its cadaverous phenomena and changes. Although 

 several of these considerations seem to belong to the study of 

 natural philosophy, chemistry, physiology, and pathology, ra- 

 ther than anatomy, there is none of them that will not en- 

 lighten the anatomist, not one of them that he should neglect. 



