period, so as to alter the moment of (conception), and that the season must exercise considerable influence. I am of opinion that in such questions as that which forms the subject of my little work, we physiologists should learn much from men of practice and experience, such as you, who have afforded proofs of their knowledge. The best results will follow when the raisers and experimentalists direct their attention to the same object." I would here acknowledge the courtesy and kindness of Professor Thury in so readily responding to my inquiries. The experiments conducted in Switzerland were decisive in support of Professor Thury's theory. In a trial of twenty-eight cows, it proved correct in the whole number. In the selection of the male, you will have to consider the faulty or defective points in your cows with a view to correct them. As far as possible--pedigree being right--you ought to purchase the bull that is strong upon the points where your females are faulty. If this is not duly attended to, the defect or malformation may be aggravated. But although the bull selected possesses the excellence wanting in the cows, he ought, of course, not to be very deficient in other points, else the cure may be worse than the disease. If possible, he should be taken from a pasture not superior to your own. Docility of temper in male and female is indispensable. Inexpressible mischief may be done by the introduction of wild blood into the herd, for it is sure to be inherited. I have suffered seriously by this error. To be good behind the shoulder, good in the girth, and well down in the fore-rib, are the qualifications most difficult to attain. Lightness of the fore-rib shows a tendency to delicacy of constitution, and strength and soundness are most important to the success of the breeder. Depth of rib is more important in the male than in the female. Lightness of the fore-rib may be tolerated when milk is the object (and many great milkers are so characterised), but not where the production of beef is the object. Then you must study to combine quality with weight. Quality ought to be the first consideration, but we must never forget that all must come to lbs. at last. I have already given my opinion as to the shape and quality of a perfect breeding and feeding animal. I shall only here remark that it is indispensable in our cold climate that the animals should have a good coat of soft silky hair to defend them from the cold blasts of autumn, winter, and spring.