200 



PAINT TECHNOLOGY AND TESTS 

 NORTH DAKOTA TESTS 



fefe, 





19. Formula No. 22, Section 

 23, 1907 Fence. Cracks 

 in Paint Coating, Caused 

 by Cracks in Wood; 

 Coating Otherwise i n 

 Good Condition 



20. Test No. 8, on 1906 

 Fence. Surface Checking 

 Only 



21. Combination Cracking 

 and Checking on Section 

 69, on 1908 Fence 



22. Cracks in Paint Coating, 

 Caused by Cracking of 

 Hard Pine Wood 



23. Section 65 on 1908 Fence. 

 Showing Early Break- 

 down of Corroded White 

 Lead 



