NOVEMBER, 1893. 
On the food of green plants.! 
4 CHARLES R. BARNES. 
Ce ostant tendency of biological science is to minimize 
erence between the physiological processes of plants 
nimals, and to recognize, under the varying forms, a re- 
ble functional unity. External form and even function 
studied long before it was known upon what, in essence, 
Dujardin, a zoologist, seeking in 1835 a 
for the living matter of which some of the simplest ani- 
mre composed, selected the word ‘‘sarcode.” Von Mohl, 
St, seeing in 1846, in the cells of some plants, pre- 
mnamed contents which he considered the simplest 
Material, called it ‘‘protoplasm.” The acute Payen im- 
Suspected the identity of these two substances. 
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Vay section G, A. A. A. S., Madison meeting, August, ale 
XVIII No. 11, 
