Some of the swamp white oaks, whose leaves are but slightly turned up, look as if crisped by frost. The grape leaf also, where it occurs, is sufficiently conspicuous. Thus the leaves take an airing. It is like etching on silverware. If you look sharply, you perceive also the paler under sides of the oaks and birches in the background contrasting with the darker upper sides of their lower leaves. In a maple swamp every maple-top stands now distinguished thus from the birches in their midst. Before they were confounded, but a wind comes and lifts their leaves, showing their lighter under sides, and suddenly, as by magic, the maple stands out from the birch. There is a great deal of life in this landscape. What an airing the leaves get! Perchance it is necessary that their under sides be thus exposed to the light and air in order that they may be hardened and darkened by it.