duff

Forest fires have often been started from wantonness; for the sake of making a big blaze, fires will be carelessly left by guides, or will be smouldering in the duff,* where it will burn for weeks. I have seen the smoke from fires in the duff even after the snow has fallen.

* Local term for the vegetable growth covering the forest ground of the Adirondacks. under the spruce trees, the falling needles accumulate to considerable depth, forming the "spruce duff," a peculiar and interesting variety of forest humus.

The great bulk of the coal burnt under our boilers is duff of a very small size, and a mixed coal of duff, peas, and small nuts.