Issued April _"_'. IMS 

 'd Fcbnuiry 28, 1910. 

 Reprint January 24, I'M 2. 



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 OF I 

 1912. 



