Sycamore-Tree, or Sycamore Maple; Acer Pseudo-platanus, L. a large and beautiful tree, supposed to be a native of Germany, but reared in Britain, principally for the sake of its elegant appearance in plantations. - It is of quick growth, though increasing in size till 200 years old, and attaining the respectable age of four centuries : it flourishes in exposed situations near the sea, where a plantation of these trees, at 50 feet asunder, interspersed with three sea sallow-thorns between every two of the former, makes an excellent fence against the spray of the ocean. The sycamore, however, thrives most luxuriantly in a loose -black earth; and the young trees ought to be transplanted at the age of 15 or 20. - Its wood is soft and white, readily works in the lathe, and is employed by turners, for manufacturing wooden bowls, dishes, trenchers, etc. When the sap rises in the spring, or retreats in the autumn, a considerable quantity of sweetish juice exudes from a hole made in the trunk, about 12 inches from the root, amounting daily to 7, 8, or 10 quarts from each tree. The Highlanders convert this liquor into an agreeable, and wholesome wine: when clarified, evaporated, and subsequently inspissated, it affords a fine, white sugar (in the proportion of one pound from 16 quarts of the sap) ; which, however, is too purgative for common use. - There are two varieties of this tree, one having broad leaves and large keys, while those of the other are variegated: the latter is propagated chiefly by inoculating and ingrafting ; as it seldom produces perfect seeds.