BOOK XI. xcv. 234-.\c\a. 238 



Sows give their lirst dugs to the pigs born first in 

 each htter, these being the dugs nearest to their 

 throats, and each pig in the Htter knows its own dug 

 in the oi'der in which it was born, and gets its food 

 from that one and not at another. If its nursehng 

 is taken away from it the dug at once goes dry and 

 shrivels up, whereas if one out of the whole htter is 

 left the dug that had been assigned to it at birth 

 alone hangs down and does service. She-bears carry 

 four dugs. Dolphins only have two nipples at the 

 bottom of the belly, which are not prominent and 

 project shghtly sideways ; and the dolphin is the 

 only aninial that gives suck while in motion. But 

 whales and seals also suckle their young. 



XCVI. A woman's milk produced before the Lactation. 

 seventh month is of no use, but from that month, mUk. 

 when the embryo is ahve, it is healthy. With the 

 females of most species milk flows from the whole 

 of the dugs and even from the fold of the shoulder- 

 blades. Camels have milk until they are in foal 

 again; cameFs milk is thought to be most agreeable 

 if three parts of water are added to one of milk. 

 A cow does not have milk before calving ; and after 

 the first cahing there are always biestings, which 

 condense into a sort of foam "^ unless water is mixed 

 with them. Asses in foal begin to give milk at once. 

 Where the pasture is rich it is fatal for their foals to 

 have tasted their mothers' milk in the two days after 

 birth ; the name for the ilhiess is biestings-fever. 

 Cheese is not made from species with teeth in both 

 jaws, as their milk does not curdle. Came^s milk 

 is the thinnest and mares' milk the next thin ; 

 asses' milk is thickest, so that it is used as a sub- 

 stitute for rennet. Asses' milk is actually thought 



581 



