206 Interim Report on Veterinary Investigations. 
any time produced, nor any disturbed condition of. the bowels. 
It was observed that she grew rapidly, and maintained a thriving 
appearance. 
The result of these experiments would seem to negative the 
opinion that the death of the heifer, the subject of the original 
experiment was due to the quantity of cake of which she par- 
took, and that it most likely depended on that special lot having 
undergone some peculiar change, due probably to long-keeping. 
It has often been noticed that oil cake when old, is not merely 
deteriorated in feeding properties, but that it is really dangerous 
to the life of animals. The development of microscopic fungi 
has been assigned as the cause of this, and probably with much 
correctness ; but in the present state of science it is scarcely 
safe to speak other than hypothetical ly on the point.* 
IV. — Feeding Pigs with Haedon's Cake. 
July \%tli, 1871. — A three-months- old pig was supplied with 
^ lb. of Hardon's cake, mixed with some wetted bran and corn — 
chiefly oats. This quantity was given daily for three days, 
when it was increased to 1 lb. In three days more it was again 
increased, the quantity now being \^ lb. ; at which rate it was 
continued down to July 29th, an occasional attempt being made 
to induce the animal to take a larger amount, but without 
success. Indeed, throughout the experiment, the animal showed 
very little relish for the cake, but would eat other food most 
readily. 
On July 2'dtli a second pig of the same age was placed with 
this one, and 3 lbs. of cake supplied to the two animals. It is 
necessary here to observe that this pig had been fed with another 
one, from July 21st to the 29th, on linseed cake, in addition 
to its ordinary food. 
From July 29th to August 7th inclusive, the quantity of 
Hardon's cake was kept at 3 lbs. daily. It was now raised to 
4 lbs. On the second day afterwards, the animals refused 
to take their food, excepting in small quantities, and did not 
consume more than 2 lbs. of the cake daily for the next four 
days ; but otherwise their health did not seem to be affected. 
On August 13th they again partook of 3 lbs., and, within a day 
or two, of 4 lbs. ; more than this, however, they could not be 
induced to eat. With a daily supply varying from 2 lbs. to 
4 lbs., the experiment was ccmtinued down to September 30th, 
when it ceased. 
As in the case of the heifer fed with Hardon's cake, these pigs 
• See the Annual Report of the Consultiug Botanist, p. 211. — Ed. 
