Shrinking and Swelling of Wood in Use.

摘要

Wood normally shrinks as it dries and swells as it absorbs moisture. These changes in its dimensions are of importance to anyone who uses wood, whether for tanks or toys, shoe lasts or ships, because wood readily takes on or gives off moisture, even from the atmosphere. Successful use of wood for exacting purposes under wide variations in atmospheric humidity shows that the problems arising from the shrinking and swelling of wood can be surmounted.