BOTANICAL ABSTRACTS 



Published Monthly (Volume I, No. 1, was published September, 1918) 



— is an index of international botanical progress. 



—stands for accuracy, completeness, and prompt publication. 



—published the following entries: Vol. 1—1681; Vol. 11—1371; Vol. Ill— 3061; Vol. IV— 1853; 

 Vol. V— 2426; Vol. VI— 2032. 



— refers to more ftian 2000 serial publications to secure abstracts and citations. 



—accompanies non-English titles with an English translation. 



— publishes all abstracts in English. 



— uses a thorough system of cross references. 



— allows the quickest possible reference to all botanical articles, by a typographical arrange- 

 ment that permits prompt reference to author, title, and place of publication. 



— furnishes to workers, having restricted library facilities, information concerning all articles 

 published in the botanical field. 



— furnishes to workers, having access to large libraries, a thorough classification by subjects — 

 an invaluable reference aid and time saver. 



— has been ordered by subscribers in all countries in the world. 



— offers infinitely more as an investment than any other publication issued in this field. 



Four Volumes are published a year. Price per Volume : $ 3.25, net postpaid. 



Orders may be sent to the publishers, or to Maruzen Company, Ltd. (Maruzen Kabushiki- 

 Kaisha), 11 to 15 Nihonbashi Tori-Sanchome, Tokyo; Fukuoka, Osaka, Kyoto and 

 Sendai, Japan. 



Williams & Wilkins Company, Mount Boyal and Guilford Avenues, Baltimore. Md., U. S. A. 



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