The quantity of oil-cake given to fattening stock varies from 2 lbs. to 14 lbs. per diem. I believe there is no greater mistake made by feeders than that of giving excessive quantities of this substance to stock. If their object in so doing be to enrich their manure-heap, they would find it far more economical to add the cake directly to the manure--or rather of adding rape-cake to it, for this variety of cake is fully as valuable for manurial purposes as the linseed-cake, and is nearly 50 per cent. cheaper. A larger quantity of oil-cake than 7 lbs. daily should not be given to even the largest-sized milch cows or fattening bullocks. If a larger amount be employed, it will pass unchanged through the animal's body. Young cattle may with advantage be supplied with from 1 to 3 lbs., according to their size, and from 1/2 to 1 lb. will be a sufficient quantity for sheep. Intelligent feeders have remarked, that cattle which had been always supplied with a moderate allowance of this food fattened more readily upon it, during their finishing stage, than did stock which had not been accustomed to its use. _Adulteration of Linseed Cake._--The great drawback to the use of linseed-cake is the liability of the article to be adulterated. The sophistication is sometimes of a harmless nature, if we except its injurious effect on the farmer's pocket; but not unfrequently the substances added to the cakes possess properties which completely unfit them to be used as food. Amongst the injurious substances found in linseed and linseed-cake I may mention the seeds of the purging-flax, darnel, spurry, corn-cockle, curcus-beans, and castor-oil beans. Several of these seeds are highly drastic purgatives, and they have been known to cause intense inflammation of the bowels of animals fed upon oil-cake, of which they composed but a small proportion. Amongst the adulterations of linseed-cake, which lower its nutritive value without imparting to it any injurious properties, are the seeds of the cereals and the grasses, bran, and flax-straw. Little black seeds belonging to various species of _Polygonum_, are very often present in even good cakes; they are very indigestible, but otherwise are not injurious. Rape-cake is stated to be occasionally used as adulterant of the more costly linseed, but I have never met with an admixture of the two articles.