AMERICAN PUBLISHER'S NOTICE 



TO THE SIXTH EDITION. 



IN the preparation of the Sixth American Edition every page has been 

 subjected to careful scrutiny and considerable liberty taken with the text. 

 Useless verbiage has been omitted, obscure sentences have been revised or 

 entirely rewritten, a large number of typographical errors have been cor- 

 rected, histological details (except of the nervous system) have been mate- 

 rially abridged, much that was too theoretical has been omitted, and such 

 other alterations and additions have been made as to bring the book up to 

 date and render it in a more advantageous form for the student. The his- 

 tology of the nervous system has been retained in full, as has also the 

 valuable Chemical Appendix features that will be appreciated by both 

 student and teacher. The more important additions have been dis- 

 tinguished by enclosure in brackets [ ]. 



PHILADELPHIA, September, 1895. r 



