This circular presents the results of the first 10 
years of a 30-year breeding demonstration conducted 
with beef cattle at Sni-a-Bar Farms, Grain Valley, 
Mo. The demonstration is the most comprehensive 
undertaking of its kind, for the purpose of estab- 
lishing the worth of purebred sires. It was conceived 
and begun by W. R. Nelson, a public-spirited citizen, 
whose will provided for its continuance in the 
interests of better stock breeding. 
The breeding operations at Sni-a-Bar Farms are 
conducted along scientific lines and the public 
demonstrations held annually at the farms have been 
attended in recent years by about 10,000 visitors— 
many from other States—who seek information on 
livestock improvement through the use of purebred 
sires. This circular aims to convey the information 
to those who are unable to visit the farms. 
In the preparation of the circular the department acknowledges 
helpful cooperation of Irwin Kirkwood, of the W. R. Nelson Estate; the 
late H. J. Waters, who was actively associated in the management of 
the farms; E. A. Trowbridge, professor of animal husbandry, University 
of Missouri; W. A. Cochel, representing the American Shorthorn Breeders’ ~ 
Association and adviser in breeding operations; and others. Following 
Doctor Waters’s death, October 26, 1925, Mr. Cochel succeeded him as 
manager of Sni-a-Bar Farms. The data contained in this circular have 
been made available to the department and the public through the 
generosity and assistance of the persons mentioned. 
