PREFACE. Vii 



nite arrangement, is pre-eminently associated with the mental 

 principle, and is connected with, and presides over, the other 

 parts. 



The brain is always situated at the anterior or cephalic 

 extremity of the animal, and with it are invariably connected 

 the organs of the senses, the inlets to perception. We soon 

 find that the brain exhibits a subdivision into distinct parts ; 

 and of the relative importance of these parts, and their con- 

 nection with the organs of sense, and with the intellectual 

 functions, we derive the most important information, from 

 the study of comparative anatomy. 



In place of " questions," the Author has preferred to give 

 an analysis of the paragraphs, which will render it equally 

 compulsory with the Teachers and the students, to make 

 themselves acquainted with the book; moreover, it forms 

 an analytical index of the contents of the lessons, of much 

 value. 



Instead of appending a glossary of technical terms, neces- 

 sarily used, the translation of difficult, or uncommon words 

 has been given, simultaneously with the use of them, and to 

 this rule, it is hoped, there are but few exceptions. 



It is presumed that the beauty of the wood engravings, 

 that so plentifully adorn this work, is so apparent, that little 

 requires to be said in their praise ; the Author feels, however, 

 desirous of expressing his deep obligations, and tendering his 

 best thanks to the accomplished artist who produced them, 

 Mr. H. E. Downer, of this City. As the work of a young 

 man only nineteen years of age, they are extraordinary ; whilst 

 the incessant labor necessary to their production, and the 

 untiring energy and zeal displayed by him, are worthy of the 

 utmost commendation. It may be a matter of observation 

 and remark, that the style of all the engravings is peculiar. 

 Nearly thirty years ago, the Author had a series of 400 

 diagrams, for public lectures, prepared on this principle 

 white figures, on a dead-black ground. They consisted of 

 subjects kindred to the illustrations of this book, and, from 

 their distinctness, elicited universal approbation. 



He has always (subsequently) thought that the same plan 

 would prove most effective for wood-engravings of the same 



