THE JERSEY, ALDERNEY AND GUERNSEY COW. 75 



'' This proportion between the size of the veins and 

 the milk secreted is observed in all females, without 

 exception. The largeness of the veins and their vari- 

 cose state, being a consequence of the quantity of blood 

 attracted by the activity of the milk glands, is not only 

 the sign but also the measure of this activity; the con- 

 nection between the two phenomena is such that, if the 

 glands do not give an equal quantity of milk, the larger 

 veins are on the side of the gland which gives the larger 

 quantity/* 



There remains for me to notice the most valuable of 

 all methods to determine the milking qualities of the 

 cow. It is Guenon's system. Francois Guenon, risen 

 from the humbler classes, and from his boyhood being 

 amongst milch cows in his native country in the vicinity 

 of Bordeaux, narrowly observed the relation between 

 the amount of milk secreted and the development of 

 the patch of skin, covered with upturned hair, extending 

 from the udder upwards, and laterally over the thighs. 

 He determined from this that it is possible with great 

 accuracy to determine the value of a dairy cow. 



For long was Guenon's system a secret. His career 

 has, however, been most fortunate, and the substantial 

 manner in which he established his claims as a discov- 

 erer in this very important matter has insured him much 

 distinction. 



'' The Agricultural Society of Bordeaux appointed a 

 committee, in 1837, to test Guenon's capabilities, and 

 they reported that, although the mode by which he 



