238 TREES AS GOOD CITIZENS 



sliding scale a basic species-value for New Jersey towns 

 and cities has been worked out which gives a species score 

 of 20 to the American Elm, Norway Maple, Red Oak and 

 Pin Oak, and which grades other trees thus: Oriental Plane 

 1 8, European Linden 18, American Ash 17, Red Maple 17, 

 Sycamore Maple 17, Sugar Maple 16, Horse Chestnut 16, 

 Tulip 16, Silver Maple 15, and the Carolina Poplar 15. 



All things considered, this basis of valuation seems to 

 come nearer than any other to establishing the true value 

 of to-day, and does not conflict radically with Professor 

 Roth's dictum that "from the standpoint of city beauti- 

 fication, and considering the enjoyment people get out of 

 them, good shade trees are worth $100 apiece." This 

 method differs from the Parker and Colton plans in no 

 other particular than in the value of the unit. It must be 

 remembered that the Roth method was promulgated 30 

 years ago, the Parker method in 1907 and the Colton 

 method in 1916. In keeping with all else, tree planting 

 has increased in cost within recent years, and it is proper 

 to recognize this in formulating a present-day table of 

 values. 



Application of various figures to individual trees 

 affords concrete example of the workings of the plans of 

 appraisal. The experience of Newark, New Jersey, may 

 be accepted as typical of what can be accomplished in any 

 municipality and for this reason recourse could be had 

 to the admirable records of that city in working out a table 

 of values for particular specimens. This table would 

 take account of one tree of each of nine species set out in 

 Newark, since the city undertook municipal planting 

 in 1904. These 9 trees could be regarded as thrifty 

 representatives of the city's total planting of 32,000 trees, 

 showing the rate of growth under favorable conditions. 



