476 JUDGING FARM ANIMALS 



can be examined. The following very clear statement of age 

 of teething in swine, is by Dr. D. Mclntosh. 2 



"At birth, the young pig has eight teeth four tem- 

 porary incisors and four temporary tushes ; about the tenth 

 day appear the second and third temporary molars ; at one 

 month, four incisors are out, two in the upper and two in 

 the lower jaw ; about the sixth week, the temporary foremost 

 molars are visible ; at three months, two more are added to 

 each jaw; at this period all the milk teeth are in position. 

 Time is then allowed for the jaws and teeth to grow, and at 

 six months, in the majority of pigs, a small tooth comes up 

 on either side of the lower jaw, behind the temporary tushes, 

 between them and the molars; and in the upper jaw, 

 directly in front of the molars ; at six months, the fourth 

 molar appears through the gums ; at nine months the corner 

 incisors are displaced and permanent ones make their 

 appearance. The permanent tushes are also cut at this time, 

 and the fifth molar on each side of both jaws makes its 

 appearance. At one year the middle incisors are replaced 

 by permanent ones, and by this time the tushes are of a 

 considerable size ; at this period the temporary incisors are 

 shed and replaced by permanent ones ; at eighteen months, 

 in most pigs, dentition is complete, as the lateral incisors 

 and the sixth molar are up." 



The stomach of the hog has a capacity of about one and 

 a half to two gallons. Sisson states 3 that its left part is 

 large and rounded, while the right part is small, and bends 

 sharply upward to join the small intestine. There is a large, 

 blind pouch in the upper end of the stomach, the diverticu- 

 lum ventriculi. The stomach of the hog is much more 

 simple than that of the ox or sheep. 



The intestine of the hog is about fifteen times the length 

 of the body, the small part being from 50 to 65 feet long 

 and the larger 12 to 15 feet long. 



The liver is relatively large, weighing about four pounds 



2 Diseases of Swine, 1897, p. 22. 



8 The Anatomy of the Domestic Animals, 1914, p. 483. 



