in Thoreau’s Journal:

Every one, no doubt, has looked with delight, holding his face low, at that beautiful frostwork which so frequently in winter mornings is seen bristling about the throat of every breathing-hole in the earth’s surface. In this case the fog, the earth’s breath made visible, was in such abundance that it invested all our vales and hills, and the frostwork, accordingly, instead of being confined to the chinks and crannies of the earth, covered the mightiest trees, so that we, walking beneath them, had the same wonderful prospect and environment that an insect would have in the former case. We, going along our roads, had such a prospect as an insect would have making its way through a chink in the earth which was bristling with hoar frost.

That glaze! I know what it was by my own experience; it was the frozen breath of the earth upon its beard.