38 BULLETIN 246, U. S. DEPARTMENT OF AGRICULTURE. 
Item 24. All bricks which differ so markedly in color from the type or average 
of the shipment as to make the resultant pavement checkered or disagreeably 
mottled in appearance. This item shall not be held to apply to the normal varia- 
tions in color which may occur in the product of one plant among brick which 
will meet the rattler test as referred, to in items 15, 16, and 17, but shall apply 
only to differences of color which imply differences in the material of which the 
brick are made, or extreme differences in manufacture. 
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