BOOKS BY THE AUTHOR 
The Study of the Biology of Ferns, by the Collodion Method. 
Large 8vo pp. 1-xm-+1-134. 163 figs. Macmillan & Co., 
New York, 1894. Price $2.00 (Out of print). 
Elementary Botany. 2nd Edition, pp. -xxm--1-444. 508 figs. 
Henry Holt & Co., New York, 1899. Price $1.25. 
Lessons in Botany. pp. r-xv-+1-365. 277 figs. Henry Holt 
& Co.. 1900. Price $1.10. 
First Studies of Plant Life. pp. -xm+1-276. 308 figs. Ginn 
& Co., Boston, 1903. Price 60 cents. 70 cents by mail. 
Studies of American Fungi; Mushrooms, Edible, Poisonous, etc. 
pp- L-v14-1-322, 86 plates, 8 colored 238 figs. 2nd Edition, 
Andrus & Church, Ithaca, 1901. Henry Holt & Co., New 
York, 1903. Price $3.00 net. . 
Ist Edition. pp. -vi-+1-275, 76 plates, 8 colored, 223 figs. 
Andrus & Church, 1900. Price $2.00. 
Relation of Plants to Environment, or Plant Ecology, Outlines. 
pp. 67,1904. Price 75 cts. 
