CONTENTS. Vll 



Examples of Mechanical Powers 60 



Failure of Calculation as applied to the Circulation 61 



Chemistry : its useful Application to Physiology and 



Pathology 64 



General Utility of the Physical Sciences as a Branch of 



Medical Education 67 



Vital Properties 68 



Import of the Expression — 



Hypotheses respecting Life 70 



Comparative Anatomy 74 



The first Foundation of Physiology — 



Its Importance in reference to Physiology 75 



Examples 76 



Necessary Caution in employing Arguments from Analogy 77 



LECT. IV. 



Nature of Life. — Methodical Arrangement of Living Beings — 

 Species, Varieties, Genera, Orders, &;c. — Progressive Simplifi- 

 cation of Organization and Functions. — Intellectual Functions of 

 the Brain, in the natural and disordered state, explained on the 

 same principles as the offices of other Organs. 



Distinguishing Characters of Living Bodies 80 



Great Variety of Forms 81 



Species 82 



Individual Varieties of all Natural Productions 83 



Examples in the Human Mind, and consequent Absurdity 



of Attempts at producing Uniformity of Actions and 



Opinions — 



Varieties 85 



Genera and Orders — 



Classes and Departments 86 



Simplification of Organization 87 



Exemplified in the Four Departments of the Animal 



Kingdom — 



Exemplified in the Nervous System 90 



Corresponding Modifications of Function 91 



The Mental Phenomena are the Functions of the Brain . . 92 

 Experience proves thiS;, but does not shew the Manner in 



which the Effect is produced — 



A 2 



