40 BULLETIN 313, U. S. DEPARTMENT OF AGEICULTUEE. 



SECTION II.— VISUAL INSPECTION. 



It shall be the right of the buyer to inspect the brick, subsequent to their 

 delivery at the place of use, and prior to or during laying, to cull out and 

 reject upon the following grounds : 



Item 20. All brick which are broken in two or chipped in such a manner that 

 neither wearing surface remains substantially intact, or that the lower or bear- 

 ing surface is reduced in area by more than one-fifth. Where brick are rejected 

 upon this ground, it shall be the duty of the purchaser to use them so far as 

 practicable in obtaining the necessary half brick for breaking courses and 

 making closures, instead of breaking otherwise whole and sound brick for this 

 purpose. 



Item 21. All brick which are cracked in such a degree as to produce defects 

 such as defined in item 20, either from shocks received in shipment and handling 

 or from defective conditions of manufacture, especially in drying, burning, or 

 cooling, unless such cracks are plainly superficial and not such as to perceptibly 

 weaken the resistance of the brick to its conditions of use. 



Item 22. All brick which are so offsize, or so misshapen, bent, twisted, or 

 kiln marked that they will not form a proper surface as defined by the paving 

 specifications, or align with other brick without making joints other than those 

 permitted in the paving specifications. 



Item 23. All brick which are obviously too soft and too poorly vitrified to 

 endure street wear. When any disagreement arises between buyer and seller 

 under this item, it shall be the right of the buyer to make two or more rattler 

 tests of the brick which he wishes to exclude, as provided in item 2, and if in 

 either or both tests the brick fall beyond the maximum rattler losses permitted 

 under the specifications, then all brick having the same objectionable appearance 

 may be excluded, and the seller must pay for the cost of the test. But if under 

 such procedure the brick which have been tested as objectionable shall pass the 

 rattler test, both tests falling within the permitted maximum, then the buyer can 

 not exclude the class of material represented by this test and he shall pay for 

 the cost of the test. 



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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