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Greenheart Wood Solves For years American engineers ° e have been searchin or a_ stron Engineering a wood ae gs a he in soil or be destroyed by marine Problem borers in water. U. S. Department of Agricul- ture Forestry experts § after in- tensive research and_ investigation located such a wood in British Guiana. U. S. Government Experts Declare It is called GREENHEART. The Government Engineers Officially report and declare That ‘“GREENHEART is unsurpassed as a construction timber.” That “The unusual Qualities of GREENHEART are manifested par- ticularly in its structure, its great weight, its superlative strength and its great durability.”’ That “Authentic records show that the best grades of GREENHEART surpass iron and steel in durability when placed in water or in contact with the soil.”’ That “Its undoubted value to the engineering profession is exemplified by its numerous good qualities.”’ That “Its strength as a post or beam and its stiffness are considerably higher than that of the strongest and stiffest of the 130 North American woods so far tested at the Forest Products Laboratory.” That “It contains heartwood that is almost immune to decay, and which is probably more resistant to the teredo and other marine borers than any of the hundreds of species of timber so far used as piling.”’ That ‘‘On land it is exempt from attack of white ants.”’ That ‘In Europe it is generally considered .of more value for lock-gate construction and piling than iron, or timber of other species.”’ That ‘‘It is the favorite wood for flooring, often lasting from 50 to 75 years without signs of wear.”’ That ‘*The wood, moreover is remarkably free from knots, and generally sound.”’ That ‘‘It is said to be the strongest timber in use, with a crushing strength of 12,000 pounds per square inch, 65 per cent greater than that of English oak.”’ The statements quoted above are extracts from U. 8. Government printed reports—Department of Agriculture circulars, etc. They are not statements of the producers. No creosote treatment required. Recent tests by Columbia University Engineering Department show GREENHEART wood to be fire-resistant. For further information address— THE GREENHEART LUMBER COMPANY, INC. 70 Wall Street New York City MARINE REview—April, 1931 89