The seeds of white ash are equipped for moderate flight. The wing is large, but the seed attached to the end of it is heavy enough to give it a sharp tilt downward when it begins its flight through the air, and it generally shoots at a steep angle toward the ground. It is not apt to whirl through the air with a gliding motion like a maple seed. Consequently, ash seeds are not great travelers. They are dispersed with economy, however, for all do not come down at once, but many hang on the tree for months, and a few go with every strong wind, thus getting themselves scattered in every direction. Their power of germination is low, and only about forty per cent of seeds are fertile. This is due to the fact that pistillate and staminate flowers do not grow on the same tree, and fertilization is imperfect. The importance of ash in the industries of the country does not depend on the quantity but the quality of the wood. Although the various species are produced in thirty-nine states, as shown by mill statistics, the total yield is less than 250,000,000 feet a year. That is exceeded by several woods, among them hickory, elm, beech, basswood, chestnut, and even larch. The wood of ash which has grown rapidly is generally considered superior to that of slow growth. The reason is found in the fact that trees of slow growth do most of their growing early in the season, and the wood is porous; but trees of rapid growth lay summerwood on abundantly, and it is dense. Few species show a sharper line between spring and summerwood than ash, for which reason the annual rings are clear-cut and distinct. What figure ash has is produced by the growth rings, and not by medullary rays. Quarter-sawing brings out no additional beauty. Slight crooks in many logs produce a moderate cross grain in lumber, which gives to finished ash its characteristic figure or grain. When straight-grained wood is wanted, as when it is for tool handles and oars, logs without crooks are selected. The wood of white ash is heavy, hard, strong, elastic, but rather brittle. It lacks the toughness of hickory. The medullary rays are numerous, but small and obscure. The color is brown, the sapwood much lighter, often nearly white. It is not durable in contact with the soil. Notwithstanding its name, the wood rates low in ash, and its fuel value is under that of white oak. The states which produce the largest yearly cut of this species are, ranging downward in the order named: Arkansas, Ohio, Wisconsin, Kentucky, Indiana, Michigan, and Tennessee.