246 SHADE-TREES IN TOWNS AND CITIES 



trees come under his jurisdiction. One of the first things he 

 should do when he assumes the task of caring for the trees 

 of a city is the taking of a tree census : that is, the enumera- 

 tion of all the trees of the city in field books and the careful 

 plotting of these trees on maps prepared for that purpose. 



Field Books. A form of field book for the enumeration 

 of street-trees designed by the writer has proved very ade- 

 quate and could be used advantageously in any town or city. 

 The book is made in a form similar to an engineer's transit 

 or level field book. A few leaves from such a book are in- 

 serted after page 275. The size of the leaves is four and one- 

 half inches by eight inches. The right hand page is cross- 

 sectioned into fifths of inches. On these pages each street 

 is plotted to a scale of fifty feet to the inch. Four red lines 

 drawn vertically in the centre of the page represent in con- 

 ventional form the sidewalks of the street of which the trees 

 are to be recorded. The inner two lines are the curb-lines, 

 and the outer two are the property-lines. The divisions of 

 the abutting properties are indicated by lines drawn at right 

 angles to the outer red lines. The cross streets are similarly 

 indicated by lines making the proper angles with the curb 

 and the property lines. This field book admits of the plot- 

 ting of sections of street 350 feet in length on each page. 



On the leaves from the field book inserted after page 275 

 is plotted the short street, "Shepard Street," a map of 

 which is shown, Fig. 35. The cross-sectioned paper obviates 

 using a scale in transferring the street to the field book. 

 Likewise in the indication of the position of the trees, the 

 cross-sectioning will be a guide, as the sides of the little 

 squares represent ten feet. 



On the left hand page are given the descriptions of the 

 trees. At the top of the page the name of the street and the 



