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Show American Trees. Four hundred and thirteen speciei of trees grow within tho limits of tho United States nnd territories, sixteen of which, when perfectly seasoned, will sink in water. The heaviest of these is the black ironwood, found only in southern Florida, which is more than ao per cent heavier than water. The bast-known are the lignum vitro nnd tho mangrove. Texas and New Mexico Mex-ico aro the homes of a species of oak which is about ono and one-fourth times heavier than water, and, which when green, will sink almost as quickly quick-ly as a bar of iron. It grows iu mountain moun-tain regions, nod has been found westward west-ward as far as the Colorado deBert. where it grows at an elevation of 10,000 feet. All the woods heavier than wster belong be-long to tropical Florida or the rid southwest. Oakland Col.) Ediott, |