Ahead of her was the darkness of a thinning forest.
He glanced up sharply, his lips thinning down and his face paling.
At the final thinning they should be set from 3 to 6 in.
Simplicius's further suggestion that Thales conceived the element to be modified by thinning and thickening is plainly inconsistent with the statement of Theophrastus that the hypothesis in question was peculiar to Anaximenes.
Another line of reasoning indicates that the boundary of the universe is not immeasurably distant, and that the thinning out of the stars is quite perceptible with our telescopes.