574 
DR, PROUT ON ANIMAL CHEMISTRY. 
I have heard it stated as a singular fact, that sheep fed on salt 
marshes never produce the rot; salt being pernicious to most 
insects. 
Pigs . 
The original breed of pigs in Cornwall were of a white colour, 
of a large size, long-sided, and razor-backed. This kind has 
been crossed with the Devon, Suffolk, and Leicester breeds, 
which have taken off length and sharpness, and added breadth 
and depth. Some crosses have been made with the Berkshire 
kind: this has introduced a breed which are distinguished by 
their tawny colour, spotted with black, large ears hanging over 
the eyes, thick, close, and well made body, short legs, small 
bones, and a disposition to fatten. Some crosses also have been 
made with the Hampshire breed, with success; but of all the 
various crosses (for Cornwall being so near the sea has had 
the advantage and disadvantage of several foreign breeds), none 
seem so much prized as the Chinese kind; for in breadth and 
depth, health of constitution, disposition to fatten, and flavour 
of meat, none are equal to them. 
There are many places in this county where this species of 
live stock are kept in considerable numbers; yet they are not 
generally looked on by farmers as a species of emolument, ex¬ 
cept where they can be maintained on what would otherwise be 
thrown away. In this instance they prove that no part of the 
creation is useless. The hog alone devours the refuse of all the 
rest, and contributes not only to remove what would be a 
nuisance to the human race, but also converts the most nauseous 
offals into the richest nutriment. Pennant compares, not un¬ 
justly, the hog to a miser, who is useless and rapacious in his 
life, but, on his death, becomes of public use, by the very effects 
of his sordid manners. 
OBSERVATIONS ON THE 
APPLICATION OF CHEMISTRY TO PHYSIOLOGY, 
PATHOLOGY, AND PRACTICE. 
By Wm. Prout, M.D., F.R.S. 
lecture ii. —(Concluded from p. 501). 
On Diseases connected with the Derangements of Staminal 
Principles, 
On the Operation of Remedies on different Staminal Diseases, 
There is an interesting and important point of view in which 
the preceding subject may be yet considered, namely, the dis- 
