492 EXPERIMENTS WITH SWINE. 

conditions for four successive years at the Ontario Agricul- 
tural College, Guelph. The object of these experiments was 
to compare different breeds with regard to economy of pro- 
duction and suitability for the export bacon trade, and also 
to compare the feeding qualities of maize with barley. Six 
animals of each of the following breeds were used :—York- 
shire, [2mworth, Berkshire, Chester White, Duroc Jersey, and 
Poland-China, each breed being divided into two lots of three 
hogs each, or 18 ineach set. The experiment lasted for about 
four months, and the ration consisted of maize in the case of 
one half of the pigs, and of barley in the case of the remain- 
der, together with an equal portion of wheat middlings. 
After about two months the proportion of grain was increased 
and ultimately the middlings were omitted from the ration 
altogether. Skim milk was given to the pigs for the 
first ten weeks, in the proportion of about 2 lbs. of milk to 
one of meal. The animals were given a somewhat restricted 
amount of food, the aim being to keep them in a good grow- 
ing condition without developing an excessive amount of fat. 
With regard to the amount of dry.food required to produce 
100 lbs. of gain live weight, it wes found in the four years that 
the Berkshire and Tamworths were the most econsmical, but 
the general conclusion deduced from the experiments was that 
economy of production is more influenced by the individuality 
of the animals than by the breed. With respect to suitability 
for bacon purposes, the Yorkshires were found to be the most 
uniform lot when killed, whilst the Tamworths stood second. 
As regards the comparative values of maize and barley for 
feeding purposes, it was found that the hogs receiving maize 
made the most economical gains during the time milk and 
middling's were fed, but that after the milk and middlings were 
discontinued the hogs receiving barley surpassed those on 
maize in rapidity and economy of growth. 
PASTEURISATION OF MILK. 
The Annual Report of the Ontario Department of Agri- 
culture contains an account of some results which have been 
