BULLETIN No. 143 



[February, 



Still another great advantage is the large unobstructed hay 

 mow. With the self-supporting roof, there are no timbers what- 

 ever obstructing the mow, which means no dragging of hay around 

 posts or over girders. The hay carrier runs on a circular track 

 around the mow, midway bet wen the silo and the outside wall, 

 and drops the hay at any desired point, thus in no case does the 

 hay have to be moved but a few feet, which means a saving of 

 much labor in the mowing. 



To successfully embody all of the above discussed advantages 

 in a dairy barn is one of the large problems in milk production. 

 In a careful study of the barn question it soon became apparent 

 that it was impossible to embody all of the requirements advan- 

 tageously in anything but a circular form of building, and the 60- 

 foot round barn, which is here described, was built. 



FIG. 4. SOUTH VIEW, SHOWING 



LIGHTED STARCH. 



CIRCULAR CONSTRUCTION THE STRONGEST 



The circular construction is the strongest, because it takes ad- 

 vantage of the lineal, instead of the breaking strength of the lum- 

 ber. Each row of boards running around the barn forms a hoop 

 that holds the barn together A barrel, properly hooped and 

 headed, is almost indestructible, and much stronger than a box, 

 altho the hoops are small. This strength is because the stress 

 comes on the hoops in a lineal direction. Any piece of timber is 

 many times stronger on a lineal pull than on a breaking stress. 

 Take for example a No. i yellow pine 2x6, 16 feet long, with an 



