254 NATURAL HISTORY OF THE FARM 
never know by merely reading about them: it can only 
be learned at first hand. 
Study 36. Observations on the trees in summer 
The program of work for this study will consist of an 
examination of the crowns of a dozen or more of the com- 
monter deciduous native trees, principally as to their habits 
of growth and the characters of their leaves, flowers and 
fruit. A few flowering and fruiting boughs of each tall- 
growing species should be previously pruned and brought 
down to earth for common use. 
The record of this study may consist of one or the other 
or both of the following tables, according to the needs of the 
student. Table 1, on recognition characters of the green 
tree, is intended for those who have not already a good 
acquaintance with these characters, such as is prerequisite 
to the work on reproductive habits that is outlined in the 
second table. The tables (to contain only original observa- 
tions) may be prepared with column headings as indicated 
below. 
1. Table of Growth-Characters of Trees 
Name. 
Height (estimated height of a mature tree, in feet or 
meters). 
Growth-habit (see page 72 and figure 40). 
(type (simple or compound). 
arrangement (opposite, alternate, whorled, etc.). 
form (diagram a single leaflet, if compound). 
Leaves size (length by width in inches). 
surface (rough or smooth, dull or shiny, hairy or 
spiny, etc.). 
[margin (diagram a bit of it). 
