4 BULLETIN 456, U. S. DEPARTMENT OF AGRICULTURE. 
There has been considerable variation in the size of the cubes used, 
some holding 63 pounds, some 68, and others approximately 80 
pounds. As a step toward standardizing the size of the cube, the 
San Francisco Wholesale Dairy Produce Exchange recently ruled 
that butter offered on the exchange as " extras " should be packed 
in cubes with sides, tops, and bottoms one-half inch in thickness 
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Fig. 1. — The cube is used on the Pacific coast for solid packed hulk butter. Its inside 
dimensions are 12£ inches by 12| inches by 13S inches. Its net weight is approxi- 
mately G8 pounds. 
and ends seven-eighths of an inch in thickness, lumber to be sur- 
faced on both sides, corners to be rounded, inside measurement 
12J by 12 J by 13J inches, and net weight to be marked on each end. 
The net weight of such a cube would be approximately 68 pounds. 
Cubes of a uniform size, which are neat and attractive in appearance, 
would be much more satisfactory and highly desirable both for local 
and foreign markets. 
