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. 



