INDEX TO AMERICAN BOTANICAL LITERATURE 
1908-1921 
The aim of this Index is to include all current botanical literature written by 
Americans, published in America, or based upon American material; the word 
America being used in the broadest sense. 
Reviews, and papers that relate exclusively to foresty, agriculture, horti- 
culture, manufactured products of vegetable origin, or laboratory methods 
t included, and tempt i de to index the literat f bacteriology. 
An occasional exception is made in favor of some paper appearing in an Ameri- 
can periodical which is devoted wholly to botany. Reprints are not mentioned 
unless they differ from the original in some important particular. If users 
of the Index will call the attention of the editor to errors or omissions, their 
kindness will be appreciated. 
s Index is reprinted monthly on cards, and furnished in this form to 
subscribers at the rate of three cents for each card. Selections of cards are 
not permitted; each subscriber must take all cards published during the term 
of his subscription. Correspondence relating to the card issue should be 
addressed to the Treasurer of the Torrey Botanical Club. 
Andrews, F. M. The effect of aeration on plants. Proc. Indiana 
Acad. Sci, 1920:.147, 148. 1921. 
Andrews, F. M. The effect of centrifugal force on plants. 
Proc. Indiana Acad. Sci. 1920: 143-145. 1921. 
Andrews, F. M. Phyllotaxis of mee iovevat Proc. 
Indiana Acad. Sci. 1920: 149, 1 1921 
Andrews, F. M. Studies on es III. Proc. Indiana Acad. 
Sci. 1920: 155-156. 1921. 
Baerthlein, K. Uber bakterielle Variabilitat, insbesondere 
sogenannte Bakterienmutationen. Centralbl. Bakt. Par- 
asitenk. u. Infekt. 81'!: 369-435. 31 JI 1918. 
Baker, F. C. The life of the Pleistocene or Glacial Period. 
Univ. Illinois Bull. 17: 1-476. pl. 1-56. 7 Je 1920. 
Bardell, E. M. Production of root hairs in water. Univ. Wash- 
ington Publ. Bot. 1: 1-9. 1 F 1915. 
Barrus, M. F. Bean anthracnose. Cornell Univ. Agr. Exp. 
Sta. Mem. 42: 101-214. pl. 1-8+f. 10-19. Jl 1921. 
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