180 MAMMALIA. 



2nd. Inspect carefully the pork, if possible, witli a microscope ; 

 3rd. Cook most thoroughly every piece of pork, bacon, ham, &c., 

 before use. 



The experiments which have been made to determine the 

 amount of cooking that is necessary to destroy the trichines 

 give the following results : 



1st. The trichines are killed in hams by a protracted salting, or, 

 in sausages by subjecting them to strong smoking, continued for 

 twenty-four hours. 2nd. They resist ordinary smoking for three 

 days; if prolonged, however, it appears to destroy them. -3rd. Cook- 

 ing pork hj boUing is not certain to kill them, unless performed 

 most thoroughly. 



The "Wart Hogs {Phascochceriis, F. Cuvier), which much resemble 

 the true Hogs, are distinguished from them by the structure of 

 their molar teeth. A fleshy excrescence hangs down on each side 

 of their cheeks, which gives them a repulsive appearance. There 

 are several species to be found in Africa, of which country they 

 are natives. They are very courageous, and possessed of immense 

 strength. Their habits are similar to those of the Wild Boar. 

 The Cape Wart Hog, found at the Cape of Good Hope, is probably 

 the best known. Specimens of it are generally to be seen at the 

 Regent's Park Gardens, London. 



The Peccaries [Dicotylcs, F. Cuv.) are animals which are peculiar 

 to America. They resemble the common Pig in their general 



. 4?. — Tli!^ Wliite-lipped Peccary (/>. hbiatitft). 



shape and in their teeth, but their canine tusks do not project 

 from the mouth. They are devoid of tail, and are provided 

 with a gland opening on the back, from which a penetrating 



