Id 0OO1 



l>lc\itv is the la\v. Between the mode of exigence and the 

 mode of organization of each l>ein^. there is tin- m<t admirahle 

 (K-cni'if. The proofs will be giYen in a future part ofthi>WOrk. 

 The history of the functions of animals will now eni::'u r '' 

 our attention, and tir>t, of tlie Junction of nutrition. 



Diagram taken from the "Text Book of Physiology," by Valentin,* 

 intended to show that every part of an organ is a mass which is traversed by 

 interstices in all directions. If a liquid body presses on c, while an elastic one 

 is present at d, it also renders them capable of sen-ing as a filter. H. K. 



* "A Text Book of Physiology." By Valentin. Translate 

 Brinton. II. Renshaw, Strand. 



