176 SWiNE PRACTICE 



The clitoris is relatively long. The urethra is from 3 to 4 inches 

 in length. 



The mammae are arranged in two series on either side of the 

 median line. There are 10 or 12 distinct glands and the same num- 

 ber of teats. Each teat usually has two openings and two ducts. 



The urine of swine is clear, of slight odor, pale color, faint alka- 

 line reaction and has a specific gravity of 1010 to 1015. The com- 

 position is approximately as follows : 



Urea 5 c;. 



Potassium bicarbonate 10% 



Potassium sulphate 2% 



Magnesium carbonate 1% 



Sodium chloride 1% 



Phosphates 1 % 



Water 80% 



fl 



Pig. 34. External and internal generative organs of the sow. A, ovaries; 

 B, uterine horns and fallopian tubes; C, uterus; D, vagina; E, vulva. 

 ('White's Castration.) 



The exact composition of the urine of swine depends upon the 

 nature of the food. The amount excreted daily varies from 8 to 15 

 pints. 



Mammary Secretion 



The mammary glands of the sow are arranged serially on either 

 side of the median line and usually consist of 10 to 12 distinct glands. 

 An ordinary sow produces from 4 to 7 lbs. of milk per day. Tlij 

 ccmposition of the milk according to the average of a series of analysss 

 is as follows : 



Butterfat 7% 



Casein and albumin 6% 



Sugar 5.7% 



Ash 1% 



Water 80.3% 



