250 SHADE-TREES IN TOWNS AND CITIES 



As regards the condition of the trees, they have been rated as 

 good, medium, and bad, as follows: 



Condition. Number. 



Good 9,422 



Medium 558 



Bad 973 



Total 10,953 



The sizes of the trees, measured breast high, are as follows: 

 Size. Number. 



Under 6 inches 1,698 



6 inches to 12 inches 3,089 



13 inches to 18 inches 3,947 



19 inches to 24 inches 1,451 



Over 24 inches 768 



Total 10,953 



Mapping the Trees. The method of plotting the trees to 

 scale on maps is shown in Fig. 35. This figure is drawn to 

 a scale of fifty feet to three-eighths of an inch, to accommo- 

 date it on a page of this book. The original office maps, 

 however, are carefully drawn to a scale of fifty feet to the 

 inch, and on them are shown the width of the street from 

 property-line to property-line, the width of the sidewalks, 

 the frontage of the abutting properties, the city block map, 

 and the lot numbers. The divisions of the abutting proper- 

 ties are likely to change when sales and transfers are made. 

 It is therefore best to indicate in lead pencil the lines mark- 

 ing the property divisions, and the figures showing the 

 widths of the properties and the lot numbers. The trees 

 noted in the field book are then drawn on the map. A good 

 conventional form for existing trees is a small black circle. 



