298 DAIRY CATTLE AND MILK PRODUCTION 



age and general purposes, while one or more single-storied 

 wings are provided to house the cattle. Single-storied barns 

 usually have a tight ceiling, although some are open to the 

 roof and have a monitor top to admit light from above. 

 The objection to having the space open to the roof is that in 

 cold climates this space is so great that the barn is too cold 

 in winter. 



The advantages of the one-story barn are that it may be 

 well lighted and ventilated and the construction made sani- 

 tary in every way. Additional room can be easily had by 

 extending the wings at any time. 



The Round Barn. The economy of construction in the 

 round barn was first called to attention by King. 1 Accord- 

 ing to this author, a round barn requires about 25 per cent 

 less wall to inclose it than does an ordinary rectangular 

 type. 



According to Frazer, 2 a round barn with room for 40 cows 

 requires 22 per cent less walls and from 34 to 58 per cent less 

 material than a rectangular building with accommodations 

 for the same number of animals. The silo is built in the 

 center, and the cows are usually arranged in a single row 

 around the barn, headed toward the center, except where the 

 barn is too large, when a double row is used. 



The Covered Yard or Double System of Housing. This 

 plan was first called to the attention of the public by Pro- 

 fessor Roberts 3 of Cornell University, who used it for many 

 years with the station herd of dairy cows. The plan consists 

 in having a large shed or covered yard, into which the cattle 



1 Physics of Agriculture, p. 366. 



2 Bulletin No. 143, Illinois Experiment Station. 



8 Bulletin No. 13, Cornell University Experiment Station. 



