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portant of these is the sugar, or rock maple, a native of 
eastern North America, and the principal tree yielding 
maple sugar and syrup. The sap is usually collected from 
late in February to early in April; trees from twenty to 
thirty years old are considered the most productive, and a 
tree will usually yield in a season from four to six pounds of 
sugar, some giving less and others much more. This tree 
is often planted for shade along streets and in parks, its 
beautiful coloring in the fall enhancing its value for this 
purpose. Its wood is largely used for making furniture, 
in ship-building, for tool-handles and for shoe-lasts and 
pegs. From the southeastern United States comes the 
white-barked maple, also in the collection. Another tree 
here is the red maple, ranging throughout eastern North 
America; its wood is now used in large quantities for the 
manufacture of furniture of various kinds, for gun-stocks, 
etc. The striped, or goose-foot maple, sometimes known 
also as moosewood, of northeastern North America, is a 
pretty decorative species, especially attractive on account 
of the beautiful marking of its bark. ‘The box-elder, or 
ash-leaved maple, native of eastern North America, rep- 
resents andther type with compound leaves. Three Old 
World representatives are the common European maple, 
of Europe and western Asia, the sycamore maple, from 
Europe and the Orient, and the Norway maple, with a 
number of varieties, also from Europe and the Orient. 
The sycamore maple is a valuable timber tree in Europe; 
its wood is used in the manufacture of musical instruments, 
spoons and other household utensils. Farther north on this 
ridge may be seen young trees of Koelreuteria, the varnish 
tree, native of China. 
In the buckeye family, planted north of conservatory 
range 2, is the common horse-chestnut (Aesculus); for a 
long time the native country of this tree was unknown, 
and its home was ascribed by different authors to various 
lands; it has been pretty well established now that it is 
indigenous to the mountains of Greece. Another tree here 
