^4 Street Tree System for Neic York City 79 



will meet all possible street conditions in Manhattan, have 

 been made and already described. The lowest of these esti- 

 mates, that of Planting Specification ]STo. 1, gives a cost of 

 $10 per tree. This type of planting corresponds with 

 that being done under similar conditions in Baltimore, 

 Buffalo and Brooklyn, at similar cost. The most expensive 

 type of planting as suggested for Manhattan, such as is 

 represented by Planting Specifications Nos. 4 and 5 give 

 an estimated cost of from $40 to $60 per tree. The type 

 of planting which will be most commonly demanded in Man- 

 hattan, and which is represented by Planting Specifications 

 No. 2 and 3 gives an estimated cost of from $15 to $35 a 

 tree, according to the type of grating or surface treatment 

 of tree pit used. These types of planting correspond with 

 that being done under similar condition at figures of $17, 

 $35, and $40 in ]STew Haven, Albany and Boston. 



While it is difficult to determine exactly the proportionate 

 amounts of planting, according to the various types of 

 planting specifications, which must be done in Manhattan 

 each year, a fairly accurate estimate will be as follows : 



Fifty per cent according to Planting Specification No. 2. 



Twenty-five per cent according to Planting Specification 

 No. 3. 



Fifteen per cent according to Planting Specification 

 No. 1. 



Ten per cent according to Planting Specification No. IV. 



On this basis with 1,000 trees, suggested as the amount 

 of the annual planting, we would get an estimated cost for 

 the new planting each year as follows : 



500 trees @ $15 00 $7,500 



250 trees @ 25 00 6,250 



150 trees @ 10 00 1,500 



100 trees (a) 40 00 4,000 



$19,250 

 Supervision: 



The only additional expense save planting and mainte- 

 nance would be for supervision and equipment, which is esti- 

 mated at $7,500, the details of which estimate appear below. 



