I 
yy 
255 Commonwealth, Avenue, Boston, Mass. Oct. 26, 1921. 
My dear Mr. Powell: 
I am sending to you under separate 
cover a pamphlet on arrow poisons that may be of inter¬ 
est for your botanical library. With it I have includ¬ 
ed four photographs of my economic plant charts that 
may appeal to you as the position of the orchid family 
is clearly shown as we place it in the vegetable king¬ 
dom. As the photographs were made before the original 
colored charts were proof read a few errors in the 
names of the species will be noted. Please overlook 
these, The main purpose of the charts is clear. 
The seventh volume of my orchid 
book went to press yesterday. As soon as the printing 
is done a copy will be forwarded to you. 
Yours sincerely. 
