PUBLICATIONS OF THE U. S. DEPARTMENT OF AGRICULTURE RELAT- 
ING TO THE SUBJECT OF THIS BULLETIN. 
AVAILABLE FOR FREE DISTRIBUTION BY THE DEPARTMENT. 
Identification of Commercial Fertilizer Materials. (Department Bulletin 97.) 
The Application of Optical Methods of Identification to Alkaloids and Other Organic 
Compounds. (Department Bulletin 679.) 
FOR SALE BY THE SUPERINTENDENT OF DOCUMENTS, GOVERNMENT PRINTING 
OFFICE, WASHINGTON, D. C. 
Mineral Waters of the United States : 1. Classification and Methods of Analysis; 
2. Commercial Water; 3. Saratoga Waters Sampled at Source. (Bureau of Chem- 
istry Bulletin 91.) Price, 10 cents. 
Official and Provisional Methods of Analysis, Association of Official Agricultural 
Chemists, as Compiled by Committee on Revision of Methods, Nov. 1, 1906. Pro- 
visionally Adopted by Association, Further Revised and Finally Adopted Octo- 
ber, 1906. (Bureau of Chemistry Bulletin 107.) Price, 20 cents. 
Proceedings of Twenty-seventh Annual Convention of Association of Official Agri- 
cultural Chemists, Washington, D. 0, 1920. (Bureau of Chemistry Bulletin 137.) 
Price, 25 cents. 
American Mineral Waters: New England States, With Chapter on Bacteriological 
Methods. (Bureau of Chemistry Bulletin 139). Price, 15 cents. 
Technical Drug Studies by Division of Drugs, Examination of Hydrogen Dioxid 
Solutions; Purity of Glycerin; Notes on two Important Alkaloidal Reactions; 
Separation and Identification of Small Quantities of Cocaine; Determination of 
Molybdic Trioxid; Method for Testing Ammonium Salts; etc. (Bureau of Chem- 
istry Bulletin 150.) Price, 10 cents. 
Proceedings of Twenty-eighth Annual Convention of Association of Official Agricul- 
tural Chemists, Washington, D. O, 1911. (Bureau of Chemistry Bulletin 152.) 
Price, 35 cents. 
Determination of Lithium. (Bureau of Chemistry Bulletin 153.) Price, 5 cents. 
Proceedings of Twenty-ninth Annual Convention of Association of Official Agricul- 
tural Chemists, Washington, D. C, 1912. (Bureau of Chemistry Bulletin 162). 
Price, 25 cents. 
11 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1918 
