U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY BULLETIN No. 85. 



H. W. WILEY, Chief of Bureau. 



OF THE 



UNIVERSITY 



OF 



LOGAN WAR PAGE, 



Chief, Division of Tests, 



AND 



ALLERTON S. CUSHMAN, 



Chemist, Division of Tests. 



WASHINGTON: 



GOVERNMENT FEINTING OFFICE 



1904. 



