PARK AND CEMETERY 
31 
ROAD CONSTRUCTION EQUIPMENT IN PROSPECT PARK, TROY, N. Y. 
subgrade by wheel scrapers and spread by laborers. 
The stone was then rolled by our steam roller until 
it had been brought to an even surface, a 6oo-gallon 
Studebaker watering cart preceding the roller. An- 
other layer of stone was added and the watering 
and rolling repeated until a bed of thoroughly com- 
pacted stone was formed eight inches in thickness. 
The top dressing of No. 2 was then added. The 
watering and rolling continued until a pasty surface 
was obtained, when the road was considered complete. 
These roads were subjected to a heavy traffic last 
fall, and after an exceptionally severe winter are in 
as good condition as when completed. 
In conclusion I would simply emphasize the follow- 
ing points : 
First. Select a stone possessing binding or cement- 
ing qualities. 
Second. Use all the dust of fracture. 
Third. Use the sprinkling cart constantly and the 
roller continuously. 
Tree Planting' in the 
The systematic planting and care of trees on the 
streets of the District of Columbia is under the con- 
trol of the Honorable Commissioners of the District, 
and in the immediate charge of the Superintendent of 
Parking. 
To furnish a supply of young trees the District 
operates its own nurseries. Here there is always on 
hand a good stock of the varieties required and greater 
care can be taken in their removal to the streets by the 
parties interested in their welfare. At times in the 
past, however, it has been necessary to purchase a few 
trees of a variety and size which could not be ob- 
tained from the city’s nursery, but it has been found 
that the losses resulting from such planting have been 
very great, sometimes as high as 20 per cent. In al- 
most direct contrast to this it has been noted that the 
losses among those planted from the District nurseries 
District of Columbia. 
rarely ever exceeded 1 per cent ; so the purchase of 
stock from private nurseries is not encouraged. 
The fundamental principle upon which success in 
tree-growing depends is that of the preparation of the 
soil. In grading streets and avenues, there will al- 
ways be more or less of cutting down and filling up 
and in either case the original surface soil is rendered 
unavailable. It then becomes an absolute necessity to 
make liberal provision for the future well-being of the 
tree, seeing that its sustenance for years will be de- 
rived from the preparation made before planting. 
In such cases holes eight feet in length, three or 
three and one-half in breadth, and three feet in depth 
are excavated and the contents removed and substi- 
tuted with good rich soil. This size of hole and quan- 
tity of soil gives the tree a good start in life and insures 
satisfactory growth for at least five or six vears ; then 
