FLORIDA ,STATE HORTICULTURAL SOCIETY. 
115 
ward circulation is caused by this action 
combined with capillary attraction and 
the tendency of Nature to fill space, and 
space for more sap is constantly being 
made by evaporation from the leaves. 
The return circulation is aided by the 
heavier weight of the elaborated sap, but 
as to the rest—well, I have studied at¬ 
tempts to explain this and have found 
only very lame “explanations.” We are 
dealing with live substance that exercises 
a control of its functions not possessed 
by inert matter. As my entire work has 
been seeking to understand with a view 
to acting in accord with Nature, and I 
fail to see how I could take any part in 
this work were it possible to understand 
it, I simply accept it as one of God’s great 
mysteries and bow my head in reverence 
for His wondrous works. 
Acknowledgments are due to the effi¬ 
cient State workers whom I have men¬ 
tioned as having helped me from the be¬ 
ginning of my studies. They are tire¬ 
less in their efforts, recommending lines 
of study and carefully explaining any ob¬ 
scure points. The past year Profs. Floyd 
Fawcett and Vernon and Dr. Berger 
have been especially helpful. 
Books Studied: “Agriculture for 
Southern Schools” under the correspond¬ 
ence course conducted by Prof. Vernon. 
Earle’s “Southern Agriculture,” John¬ 
son’s “How Crops Feed” and “How 
Crops Grow,” Master’s “Plant Life on 
the Farm,” King’s “The Soil,” Hilgard’s 
“Soil,” Stevens’ “Plant Anatomy,” 
Peirce’s “Plant Physiology,” Greiner’s 
“How to Make the Garden Pay,” and 
many special crop books like Fraser’s 
“The Potato” and Tracy’s “Tomato Cul¬ 
ture,” as well as books on combating in¬ 
sects and diseases like Lodeman’s “The 
Spraying of Plants,” etc. 
