desired shape or size, thus fitting it for either wide or 
narrow streets. The other trees require more moisture and 
larger open spaces about them, but have darker green 
foliage and cause less litter on the pavementj as they do not 
shed their bark, like the plane. In the suburban section 
tulips, sugar maples, scarlet and red oaks, sweet gums, 
ashes and Crimean and silver lindens make excellent street 
trees. 
Carefully grown nursery trees, with straight stems 
and an abundance of fibrous roots, are alone suitable for 
street planting, as only such trees are likely to thrive and 
make well balanced specimens, and to secure handsome, 
even rows only one kind of tree must be planted on a 
street for a series of blocks. The trees should be planted 
at least twenty-five or thirty feet apart to allow suflScient 
sunlight and air for their proper development. 
Tree Guards. Where a tree stands near a curb, a tree 
guard is required to protect the trunk from horses' teeth. 
Many thousands of the existing trees have already been 
ruined for want of the proper tree guards. A cheap and 
efficient tree guard is made of heavy wire mesh, a good 
but more expensive one of iron rods. 
Allowing a tree guard to remain, after the tree has out- 
grown it, has caused the death of thousands of our trees. 
The expanding trunk in such cases is girdled by the guard 
and the flow of sap cut off. 
Planting hy the Commission. It is the intention of the 
Commission to plant a certain number of streets each 
year with trees, protecting each tree with a guard. Resi- 
dential streets only will be selected, and the wider streets 
first. Where there are existing unsightly, decayed or 
dangerous trees on these streets, they will be removed and 
replaced with new ones. The removing of the condemned 
