vi PREFACE. 



the longing to assist in adding to knowledge, is an inesti- 

 mable advantage, not to be lightly thrown aside through 

 the desire to make an elegantly symmetrical book. While 

 I trust, therefore, that this volume contains all the more 

 important facts at present known about the working of our 

 Bodies, I as earnestly hope that it makes plain that very 

 much is yet to be discovered. 



A work of the scope of the present volume is, of course, 

 not the proper medium for the publication of novel facts; 

 but, while the "Human Body," accordingly, professes to- 

 be merely a compilation, the introduction of constant ref- 

 erences to authorities would have been out of place. I 

 trust, however, that it will be found throughout imbued 

 with the influence of my beloved master, Michael Foster; 

 and on various hygienic topics I have to acknowledge a 

 special indebtedness to the excellent series entitled Health 

 Primers. 



The majority of the anatomical illustrations are from 

 Henle's Anatomie des Menschen, and a few from Arendt's 

 Schulatlas, the publishers of each furnishing electrotypes. 

 A considerable number, mainly histological, are from 

 Quain's Anatomy, and a few figures are after Bernstein, 

 Carpenter, Frey, Haeckel, Helmholtz, Huxley, McKen- 

 drick, and Wundt. About thirty, chiefly diagrammatic, 

 were drawn specially for the work. 



Quantities are throughout expressed first on the metric 

 system, their approximate equivalents in American weights 

 and measures being added in brackets. 



H. NEWELL MAETIN. 

 BALTIMORE, October, 1880. 



