296 APPENDIX 



19. Parsons (Mrs. Dana) : How to know the Wild Flowers. Charles 

 Scribner's Sons. 1897. $2.00. 



20. Wright : Flowers and Ferns in Their Native Haunts. Macmillan 

 Company. 1901. $2.00. 



PERIODICALS 



The science of Botany is advancing so rapidly that a book is very 

 soon out of date, and one who wishes to keep abreast of the current of 

 progress should have access to one or more of the standard periodical 

 publications dealing with the subject. Some of the most available for 

 general use are : 



The Botanical Gazette, University of Chicago. Monthly. $4.00. 



Bulletin of the Torrey Botanical Club, Lancaster, Pa. $2.00. 



Forest Leaves. Pennsylvania Forestry Association, Philadelphia. Bi- 

 monthly. $1.00. 



The Plant World. Binghamton, N.Y., and Washington. D.C. Bi- 

 monthly. $1.00. 



Science. Lancaster, Pa., and Macmillan Company, N.Y. Weekly. 

 $5.00. 



Rhodora. Published by the New England Botanical Club, Boston, 

 Mass. Monthly. $1.00. 



