THE KELLERMAN PLANT PRESS 139 



The satisfaction to the teacher of having today's collections 

 ready for study at tomorrow's class will be easily imagined. One 

 can require collections with an easy conscience when the student 

 spends all of his time with the plant rather than with blotting 

 pads. The collector finds about ten times the return for his 

 time by this system that he could get with blotters. And in 

 damp weather the two methods are not comparable! The speci- 

 mens are of course better for having dried quickly. I have 

 Baptisia tinctoria in good color but have not yet obtained Mono- 

 tropa uniflora without blackening. Rarely does any trace of 

 the corrugations appear on the plants, and never yet in my 

 experience to their detriment. 



