26 



No. 27. Cooperative Work on Fats and Oils, Association of Official Agricultural 

 Chemists, 1906. By L. M. Tolman, Associate Referee on Fats and Oils. 1906. Pp. 

 6. (Out of print.) 



No. 28. Provisional Methods for the Determination of Food Preservatives as Author- 

 ized by the Association of Official Agricultural Chemists, 1905. By W. D. Bigelow, 

 Chief Division of Foods. 1906. Pp. 13. 



No. 29. Changes in Provisional Methods for the Analysis of Foods and Additions 

 Thereto, from 1902 to 1905. BvW.D. Bigelow, Chief, Division of Foods. 1906. Pp.20. 



No. 30. Changes in OfficialMethods of Analysis and Additions thereto, 1899 to 1905. 

 By H. W. Wiley, Chief, Bureau of Chemistry. 1906. Pp. 28. 



No. 31. General Results of the Investigations Showing the Effect of Salicylic Acid 

 and Salicylates Upon Digestion and Health. By H. W. Wiley, Chief, Bureau of 

 Chemistry. 1906. Pp. 12. 



No. 32. Extracts from the Proceedings of the Association of Official Agricultural 

 Chemists, 1906. Edited by H. W. Wiley, Chief of Bureau. 1907. Pp. 14. (Out of 

 print.) 



No. 33. Report on Methods of Beer Analysis. By H. E. Barnard, Chemist, Indiana 

 State Board of Health, and Associate Referee on Food Adulteration. 1907. Pp. 16. 



No. 34. Examination of Papers. F. P. Veitch, Chief, Leather and Paper Labora- 

 tory. Pp. 10. 



No. 35. Report on Colors: The Solubility and Extraction of Colors and the Color 

 Reactions of Dyed Fiber and of Aqueous and Sulphuric Acid Solutions. By H. M. 

 Loomis, Chemist, Pennsylvania Department of Agriculture, cooperating with the 

 Referee on Colors, Association of Official Agricultural Chemists. 1907. Pp. 51. 



No. 36. Chemical Methods for Utilizing Wood, including Destructive Distillation, 

 Recovery of Turpentine, Rosin, and Pulp, and the Preparation of Alcohol and of 

 Oxalic Acid. By F. P. Veitch. 1907. Reprint, 1908. Pp. 47. 



No. 37. General Results of the Investigations Showing the Effect of Sulphurous 

 Acid and Sulphites Upon Digestion and Health. By H. W. Wiley, Chief, Bureau of 

 Chemistry. 1907. Pp. 18. 



No. 38. Extracts from the Proceedings of the Association of Official Agricultural 

 Chemists, 1907. Edited by H. W. Wiley, Chief of Bureau. 1908. Pp. 14. 



No. 39. General Results of Investigations Showing the Effect of Benzoic Acid and 

 Benzoates Upon Digestion and Health. By H. W. Wiley, Chief of Bureau. 1908. 

 Pp. 15. 



No. 40. Methods for the Analysis of Maple Products and the Detection of Adulter- 

 ants, together with the Interpretation of the Results Obtained. By A. Hugh Bryan, 

 in Charge, Sugar Laboratory. 1908. Pp. 13. 



No. 41. Paper-Making Materials and their Conservation. By F. P. Veitch, Chief, 

 Leather and Paper Laboratory. 1909. Pp. 23. 



No. 42. General Results of the Investigations showing the Effect of Formaldehyde | 

 upon Digestion and Health. By H. W. Wiley, Chief of Bureau. 1908. Pp. 16. 



No. 43. Extracts from the Proceedings of the Association of Official Agricultural! 

 Chemists. Edited by H. W. Wiley, Chief of Bureau. 1909. Pp. 16. 



No. 19. Office of the Secretary. Standards of Purity for Food Products (Supersed- 

 ing Circulars 13 and 17), July 26, 1906. Pp. 19. 



No. 21. Office of the Secretary. Rules and Regulations for the Enforcement of 

 the Food and Drugs Act. Issued October 16, 1906; revised, May 23, 1908, and June 

 8, 1909. Pp. 20. 



FARMERS' BULLETINS. 



No. 3. Culture of the Sugar Beet. By H. W. Wiley. 1891. Pp. 24, figs. 9. (Out! 

 of print.) 



No. 12. Nostrums for Increasing the Yield of Butter. By Harvey W. Wiley. 1893. 

 Pp. 16. (Out of print.) 



No. 52. The Sugar Beet: Culture. Seed Development, Manufacture, and Statistics. 

 By H.W.Wiley. 1897. Pp. 48, figs. 24. 



No. 52, revised. 1899. 



No. 52, second revised edition. By G. L. Spencer. 1901. 



No. 52, third revised edition. By A. H. Bryan. 1908. Pp. 47, figs. 18. 



No. 90. The Manufacture of Sorghum Sirup. By A. A. Denton. 1899. Pp. 23,! 

 figs. 9. (Out of print.) 



No. 131. Household Tests for the Detection of Oleomargarine and Renovated But- 

 ter. By G. E. Patrick. 1901. Pp. 12. 



No. 135. Sorghum Sirup Manufacture. By A. A. Denton. Pp. 40, figs. 26. 

 [Cir. 14] 



