r: r / 

 OF TH - v/l 



"I OF / ' ' M"l 22, 



Hi-vised iM'liruary L's, 1'JIO. 

 Hi-print January 24, 1912. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY Bulletin No. 109, Revised. 



H. W. WILEY, Chief of Bureau 



SOME TECHNICAL METHODS OF TESTING 

 MISCELLANEOUS SUPPLIES, 



INCLUDING PAINTS AND PAINT MATERIALS, INKS, 

 LUBRICATING OILS, SOAPS, ETC. 



BY 



PERCY H. WALKER, 



CHIEF, CONTRACTS LABORATORY. 



WASHINGTON; 



GOVERNMENT PRINTING OFFICE. 



1912. 



