viii PREFACE. 



(2.) Very considerable additions have been made to the Histological, 

 and also (where it has seemed necessary) to the Physiological sections. 

 All such additions are enclosed within square brackets [ ]. I have to 

 acknowledge my indebtedness to many valuable Papers in the various 

 Medical Journals British and Foreign and also to the Histological 

 Treatises of Cadiat, Eanvier, and Klein; Quain's Anatomy, vol. IL, 

 ninth edition; Hermann's Handbuch der Physiologic; and the Text- 

 books on Physiology, by Eutherford, Foster, and Kirkes ; Gamgee's 

 Physiological Chemistry; Ewald's Digestion; and Eoberts's Digestive 

 Ferments. 



(3.) The Illustrations have been increased in number from 106 

 in the Fourth German Edition to 176 in the English version. These 

 additional Diagrams, with the sources whence derived, are distinguished 

 in the List of Woodcuts by an asterisk. 



There only remains for me now to express my thanks to all who 

 have kindly helped in the progress of the work, either by furnishing 

 Illustrations or otherwise especially to Drs. Byrom Bramwell, 

 Dudgeon, Lauder Brunton, and Knott; Mr. Hawksley; Professors 

 Hamilton and M'Kendrick; to my esteemed teacher and friend, 

 Professor Ludwig, of Leipzic ; and, finally, to my friend, Mr. A. W. 

 Eobertson, M.A., formerly Assistant Librarian in the University, and 

 now Librarian of the Aberdeen Public Library, for much valuable 

 assistance while the work was passing through the press. 



The Second Part will, it is hoped, be issued early in 1885. 



In conclusion and forgetting for the moment my own connection 

 with it I heartily commend the work per se to the attention of 

 Medical Men, and can wish for it no better fate than that it may 

 speedily become as popular in this country as it is in its Fatherland. 



WILLIAM STIELING. 



ABERDEEN UNIVERSITY, 



November, 1884. 



