250 MISC. PUBLICATION 218, U. 8. DEPT. OF AGRICULTURE 
The trend data are all brought together in figures 7, 8, and 9. 
These graphs serve to give an eye picture of the tax trends in the 
selected areas as enumerated above. Figure 7 gives the trend in 
forest taxes per thousand board feet of timber, figure 8 gives the 
trend in forest taxes per acre, and figure 9 the trend in taxes per 
acre in the Michigan counties classified according to predominant 
use. It will be noted that in each figure the trend is given also of 
the total State and local tax collections in the United States. This 
has been taken as the index of general tax trend with which to com- 
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06 
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- 1209 1905 1910 1915 1920 1925 19301 
YEAR 
4 SELECTED FORESTS- FIFTEEN STATES 
2 SELECTED FORESTS- OREGON AND WASHINGTON 
3 SELECTED FORESTS- WEST-SIDE COUNTIES, OREGON 
4 STATE AND LOCAL TAX COLLECTIONS IN THE UNITED STATES 
FiaurRE 7.—Trend in forest taxes per thousand board feet as compared with the trend in State and local 
tax collections in the United States. (All taxes based on 1926 purchasing power; sources of data: Tables 
99, 100, 105, and 106.) 
pare the trend in forest taxes. It is represented by the heaviest 
line in each of the graphs in order that it may be easily discerned for 
the purpose of comparison with any of the other trends. Since the 
State and local tax collections are absolute figures rather than per 
acre or per thousand board feet, comparisons should not be made of 
the absolute positions in the graphs. The only comparisons possible 
are those of trends. Since the figures are constructed on a logarithmic 
scale, direct comparisons may be made of percentage changes from 
year to year. Minute examinations of these graphs are not necessary 
to show that the tendency of all taxes studied has been decidedly 
upward. 
A comparison of forests with other classes of property as to the 
rate of increase in taxes is given in table 107. Columns 2 to 7 of 
