I have already alluded to the efficiency of bean-meal in increasing the quantity of butter: I learn, also, from observant dairymen who milk their own cows and carry their butter to market, that their baskets are never so well filled as when their cows feed on green clover, which, as dry material, is nearly as rich in albumen as beaus. I am also told, by those who have used green rape-plant, that it produces milk rich in butter. From this we may infer that albuminous matter is the most essential element in the food of the milch cow, and that any deficiency in the supply of this will be attended with loss of condition, and a consequent diminution in the quality of her milk. I am clearly of opinion that you can increase the proportion of butter in milk more than that of caseine, or other solid parts. From several, who have adopted my treatment, I learn that on substituting rape-cake for beans they perceive an increased richness in their milk. Mr. T. Garnett, of Clitheroe, who has used bean-meal largely as an auxiliary food for milch cows during the winter season, tells me that when rape-cake is substituted, his dairymaid, without being informed, perceives the change from the increased richness of the milk. Mr. Garnett has also used linseed-cake in like quantity; still his dairy people prefer rape-cake. Mr. Whelon, of Lancaster, who keeps two milch cows for his own use, to which he gave bean-meal and bran as auxiliaries, has recently substituted rape-cake[4] for bean-meal; he informs me that in a week he saw a change in the richness of milk, with an increase of butter. [4] The analysis of cotton-seed cake, in comparison with rape and linseed cake, in a former chapter of this work, will show the comparative value of that as food for milch cows.