426 THE BREEDS OF LIVE-STOCK 
The Ohio Poland-China Record was organized in 1877, 
and up to 1906 had published twenty-seven volumes. 
The Central Poland-China Association was organized in 
1880, and published twenty-six volumes of its Record up 
to 1906. In 1906, the Ohio and Central Associations 
amalgamated under the name of the National Poland- 
China Record Company, and since amalgamation thirty- 
six volumes have been published, which begin where the 
Ohio herd-books left off. The Ohio Association recorded 
103,000 head, the Central Association 48,000 head, and 
since amalgamation, 150,000 head have been recorded in 
the National. The Standard Poland-China Record Asso- 
ciation was organized in 1887, and has published thirty- 
five volumes since that time with over 256,000 registrations. 
The Northwestern Poland-China Swine Association was or- 
ganized in 1881. The Southwestern Poland-China Record 
Association was organized in 1896. These associations 
in the main are thrifty and influential, as indicated by the 
large number of registrations; but the best interests of 
the breed demand greater unity of effort and of ideals. 
In Canada, Poland-Chinas are recorded in the Dominion 
Swine Breeders’ Record. 
Duroc-JERSEY SWINE. Figs. 87, 88. 
By G. E. Day 
516. The Duroc-Jersey is an American breed of swine, 
and is of the fat- or lard-hog type. It has earned an 
enviable reputation with corn-belt farmers for early matu- 
rity, rapid fattening and prolificacy. , 
517. History. — Red pigs have existed in the United 
States for a great many years, and there seems to be no 
