Drying produces a decided increase in the strength of wood, particularly in small specimens. An extreme example is the case of a completely dry spruce block 5 cm in section, which will sustain a permanent load four times as great as a green (undried) block of the same size will.
What will drying often increase in wood? What color is also used interchangeably with "undried" for wood? What type of wood can hold four times as much of a load when dried?