EUCALYPTUS TREES. 221 
ica, eighty feet high. Wood of rosy tinge; when 
knotty or curly furnishes the birdseye and curly-ma- 
ple wood. In the depth of Winter the trees, when 
tapped, will yield the saccharine fluid, which is so 
extensively converted into maple sugar, each tree 
yielding two to four poundsa year. The trees can 
be tapped for very many years in succession, without 
injury. The Sugar Maple is rich in potash. Nu- 
merous other maples exist, among which, as the tall. 
est, may be mentioned Acer Creticum, L., of South 
Europe, forty feet ; A. levigatum, A. sterculiaceum, 
and A. villosam, Wallich, of Nepal, fifty feet ; A. pic- 
tum, Thunb., of Japan, thirty feet. 
Esculus Hippocastanum, L.—Indigenous to Cen- 
tral Asia. One of the most showy of deciduous trees, 
more particularly when, during Spring, ‘‘it has reach- 
ed the meridian of its glory, and stands forth in all 
the gorgeousness of leaves and blossoms.”’ Height, 
sixty feet. It will succeed in sandy soil on sheltered 
spots ; the wood, adapted for furniture ; the seeds, a 
food for various domestic aniamls ; the bark, a good 
tanning material. Three species occur in J apan, and 
several, but none of great height, in North America 
and South Asia, 
Ailanthus glandulosa, L.—S. E. Asia. A hardy, de- 
ciduous tree, sixty feet high, of rather rapid growth, 
and of very imposing aspect in any landscape. Par- 
ticularly valuable on account of its leaves, which af- 
ford food to a silkworm (Bombyx Cynthia), peculiar 
to this tree ; wood, pale yellow, of silky lustre when 
planed, and therefore valued for joiners’ work. In 
South Europe planted for avenues. 
Alnus glutinosa, Gaertn. — The ordinary Alder. 
