The British Pharmacopoeia, London

18. Denniston, R. H., and Kremers, R. E. — Médicinal Plants of Wisconsin (Rep. Director

Pharmaceutical Exp. Sta. Univ. Wis.. 1913-14. Madison, Wis., 1914).

*19. Van Fleet, W. — The Cultivation of Peppermint and Spearmint (U.S. Dept. Agr. Farmers' Bulletin No. 694. "Washington, D.C., 1915). Prix 5 cents.

*20. Hood, S. C. — Commercial Production of Thymol from Horsemint (Monarda punctata) (U.S. Dept. Agr. Bul. No. 372 Washington, D.C., 1916). Prix 5 cents.

21. Rabak, F. — The Effect of Cultural and Climatic Conditions on the Yield and Quality

of Peppermint Oil (U.S. Dept. Agr. Bul. No. 454. Washington, D.C., 1916). Prix 5 cents.

22. Schneider, A.— The Cultivation of Belladona in California (Agr. Exp. Sta. Bul. No. 275.

Berkeley, Cal., 1916).

23. The Pharmacopoeia of the United States of America. Philadelphia, 1916.

24. Sayre, C. B. — Mint Growing in Northern Indiana (Purdue Univ. Agr. Exp. Sta. Circular

No. 65. Lafayette, Ind., 1917).

25. Stockberger, W. W. — Production of Drug-Plant Crops in the United States (Year book

U.S. Dept. Agr. for 1917. Washington, D.C., 1918).

26. Fyles, F. — Principales plantes vénéneuses du Canada (Min. féd. de l'Agr. du Canada, div. des ferm. exp., Bul. D.S. 39. Ottawa, 1920).

*27. Russell, G. A.— Drying Crude Drugs (U.S. Dept. Agr. Farmers' Bulletin No. 1231. Washington, D.C., 1921). Prix 5 cents.

*28. Stockberger, W. W.— Drug Plants under Cultivation (U.S. Dept. Agr. Farmers' Bulletin No. 663. Washington, D.C., 1922). Prix 10 cents.

29. Davidson, J. — The Oascara Tree in British Columbia (Ministère de lTntérieur, service de la sylviculture, circulaire No. 11, Ottawa, 1922).

30. Davidson, J.— Commercial Drug-Plant Cultivation in British Columbia (Scientific Agriculture III: 285-289. April, 1923).