STRUCTURE AND OFFICE OF THE STOMACH. 



wlieat i^rows spontaneous!}' ; and the nature of the grain in 

 its original state, when unassisted by the fostering hand of 

 man. 



n. 



Observations on the Structure of the Stomnchs of different Ani- 

 mals, with a View to elucidate the Process of converting , . 

 animal and vciretable Substances into Chyle. Bi/ Eveiiard 

 Home, JEsq. F. R. S*. 



jl HE observations on the stomachs of the porpoisef, and. Fourth cavity 



of ruminating: animals, contained in two former com muni- ° .1^ T'"*" u 

 => _ _ , nam s stomacn 



cations, led rne to believe, that the fourth cavity of the rufni- divided into 



nant's stomach, while the animal is alive> is always divided, ^^o portions. 



In a greater or less degree, into two portions, in one of which 



is included the plicated structure, in the other, the villous. 



In some genera, this division is permanent, as in the camel 



and that tribe; in othprs only occasional, as in the bullock, 



deer, «heep, &:c. ^ 



If this opinion should be found to be true with respect to The-food there* 

 animals in general, it will throw considerable light on the twodiaLgfs^n 

 processes carried on in the stomach, and lead us to coyclude, it. 

 that the food undergoes two changes in it, the one prepara- 

 tory to the other, and that it is the last of these, which forms 

 the chyle. 



With a view to investigate still farther this very interesting 

 subject, I have been led to examine the internal structure of 

 the stomachs of different animals. 



In this inquiry it will be found, that the same substances Aregulargra- 



are digested by stomachs varying considerably from each form'in ani- 

 other, and many of these varieties can at present in no other mals. 

 way be accounted for, than by referring them to the general 

 principle, which pervades the structure of animals, making 

 them run into one another by a regular series of minute 



» Abiidged from the Phllos. Trans, for 1807, Part II, p 159. 

 •J- See our last vol. 



chang««s 



