SOME APPLIANCES FOR THE ELEMENTARY STUDY 
ar PLANT PHYSIOLOGY, 
W. F. GANONG. 
(WITH FIGURES I~7.) 
THE enlargement of the bounds of knowledge in any science, 
= primarily dependent on the researches of specialists, is 
greatly aided by a wide diffusion of their results through proper 
teaching. Thus are public sympathy and support enlisted, while 
the greater number of students attracted allows of wider selec- 
ie and hence better material for the development of new inves- 
tigators, This is all true of plant physiology, but at this par- 
ticular time there is an additional reason for attention to it. 
Elementary botanical teaching is at present being improved to 
V6 point of reorganization, andthe advance is chiefly in the 
eeagp of the study of the plant alive and at work, and of the 
interpretation of plant-structure through plant-function. This 
hey involves experimental plant physiology, the chief 
*stacles to Whose wide introduction are the expense and difficulty 
: making it a laboratory study. The greatest service that can 
Ne rendered to the advancement of botanical teaching at the 
ite ie seems to me the invention of simpler, more 
sini c Vea expensive and more logically conclusive experi 
ples of pe ontrating the most fundamental facts and hues 
invest} oy aology. This is as legitimate a subject a 
Mate . ee as any other, and one whose difficulty and the u ti- 
“entific value of whose results give it no mean rank. 
inane c Phe purchasable physiological appliances have ae 
Wantitatiy. investigators for obtaining results of @ ie 
0 ee i and are usually cumbrous, complicated, 
oe An investigator can afford to use nothing tee 
Miltsive but in elementary teaching, where it is srt 
1899) esults that are sought, great simplification 1m app" 
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