LABORATORY STUDY OF TEST PANELS 151 



i-i ^^r 3-- ^Hr ,_ ^^* 



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^^ 10-3 11-3 ,2-4 -i^ IW^^fflff 



MM 



45- J 4fir 47-1 



^y 2-5 ^Sr H^ 5-3" ^^? . ^^f 8-3 



47-1 





Upper set of tests made on Panels from AtlantitfCity Fence 

 Lower set of tests made on Panels from Pittsburg Fence 

 Figures at left indicate Formula Number 

 Figures at right indicate Degree of Chalking 



9** 









