LESSON 19 
STREET TREES — VARIETIES 
HE object of this lesson is to familiarize the pupil 
with the different kinds of street trees growing 
in his vicinity. The number of species is prob-: 
ably small, and the pupil should be able easily 
to learn all that are of any importance. He 
» should learn their appearance in summer and 
winter, their principal characteristics, their spe- 
cific advantages and defects. 
Materials 
Altogether the most valuable studies can be made from the 
trees themselves. Books or bulletins should be used only rarely 
for identification or to verify names. Use scientific names only 
when the vernacular names are untrustworthy. 
Procedure 
Each pupil should be assigned a considerable territory for ex- 
amination — not less than one mile and not more than two miles 
of city or village street on which trees are growing. If some of 
these are old trees and some sections newly planted, so much the 
better. Each pupil should then proceed to make a detailed ex- 
amination of the streets assigned. 
First of all he should make a simple inventory by species. 
This can be noted on a check-list, in this form: 
American elm Tt TH TN PN DN 1111 
Sugar maple PNY M1 THI THI 1 
Soft (silver) maple THI THI TN1 THI THI TN M1 
Horse chestnut TN 1111 
Catalpa MHI 11 
Ete. 
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