680 



DAIRYING. 



hi:.' i' 



«:4 



Fig. 843. — Mammary Gland of a Woman. 



finally they are extracted through the teats, 

 emulsion we name milk. • 



perfected, drop off 

 into the cavities, in 

 which they come in 

 contact with and are 

 taken charge of by 

 the water therein, 

 which also contains 

 caseine,,' albumen, 

 and milk sugar ; and 

 they are carried 

 along through duct 

 after duct into the 

 milk cisterns, and 

 The product is the 



Comparison of the Human and Bovine Milk Apparatus. 



In this connection we show the 

 mammary gland of a woman (Fig. 

 843), in Order to illustrate the corre- 

 spondence in milk-formation in the 

 human and bovine species. 



( Fig. 844 shows the lobules of the 

 mammary gland in a woman ; while 

 Fig. 845 shows the vesicles of the 

 mammary lobules in a woman's breast. 



In order further to show the similar- 

 ity of secretion of milk in the mam- 

 mary glands of animals, we give in 

 Fig. 846 a representation of the udder 

 of a rabbit. 



In this connection we show the ud- 

 ders of two cows that are good milk- 

 ers (Fig. 847), and also those of two 

 that are poor milkers (Fig. 848) ; for, the purpose of illustrating the 

 value of attention to these points, a hairy or flabby udder, as in the 

 second of these two instances, is not indicative of a prolific milker. 



Composition of Milk. 



Milk consists of water, butter, caseine, albumen, milk sugar, and 

 mineral substances. The average percentage is the following :— 



Fig. 844.— Lobules of Mammary 

 Gland in Woman. 



