INFLUENCE OF A PREVIOUS IMPREGNATION. 261 



of the color in several instances. In some the front 

 half of the body was white and the back half of the 

 body black, while in others the colors were reversed? 

 the front half of the body being black and the back 

 half white. The line of demarkation between the 

 black and the white was so regular and well-defined 

 that, if it had been possible to divide the two animals 

 transversely on the line between the white and the 

 black, and transpose the parts before putting together 

 again, a purely white pig and a purely black pig might 

 have been made from the two that were half black 

 and half white. 



It is worthy of notice in this connection that E. 

 W. Cottrell, in speaking of a cross of the Suffolk and 

 Essex swine says : " One peculiar feature with the 

 color of this cross is, that invariably the black is in 

 excess upon the hind-part of the animal, while the 

 white predominates upon its fore-parts. I have seen 

 them one half pure black and the other half pure 

 white, with the dividing line where the colors meet 

 forming a circle around the body at the middle." l 



In July, 1877, in company with my friend Dr. H. 

 B. Shank, of Lansing, Michigan, I visited the farm 

 of Mr. A. !N". Gillett, in the town of Delta, Ingham 

 County, where we saw a litter of pigs out of a pure 

 Berkshire sow, and got by a pure Berkshire boar. 



More than one-half of the pigs were apparently 

 Poland-China in the form of the head, and their 

 bodies were spotted with sandy-white. We were in- 

 formed by Mr. Gillett that the preceding year the 



1 Michigan Farmer, as quoted in William Smith's " Catalogue of 

 Breeding Swine," p. 32. 



