Due to it´s perviousness to air and it´s eco-friendliness, porcelain is particularly suitable as a fruitbowl. ❋ Unknown (2007)
In the emission from both of these sources we have a mixture of obscure and luminous rays; but the ratio of the latter to the former, in the lime light is greater than in the spiral; and, as the very meaning of transparency is perviousness to the luminous rays, the emission in which these rays are predominant must pass most freely through transparent substances. ❋ Various (N/A)
Taking as a model the expression 'transparent' for the perviousness of a substance to light, we may say that the air, when in a state of acoustic vibration, becomes 'trans-audient' for astral impulses, and that the nature of these vibrations determines which particular impulses are let through. ❋ Ernst Lehrs (N/A)
The perviousness of river bottoms contributes largely to their productiveness of this cereal. ❋ P. L. Simmonds (N/A)
The durability of a rock may depend on its perviousness to water which may enter along planes of bedding or incipient fracture planes, or along the minute pore spaces between the mineral particles. ❋ Unknown (1915)
The striking feature of this plan of drainage, worthy of note, is, that owing to the perviousness of the soil, no tap ditches are required to drain off the excess of rain water over the surface, the whole of the surplus sinking through and being carried off from below. ❋ North Carolina Land Co. (1869)
Not until he actually stood upon the peak did he know that there was the earthly hitherto -- the final obstacle of unobstancy, the everywhere which, from excess of perviousness, was to human foot impervious. ❋ George MacDonald (1864)
Similarly, an architect may deepen or enlarge, in fantastic exaggeration, his original Westmoreland gable into Rouen porch, and his original square roof into Coventry spire; but he must not put within his splendid porch, a little door where two persons cannot together get in, nor cut his spire away into hollow filigree, and mere ornamental perviousness to wind and rain. ❋ John Ruskin (1859)
From their perviousness to stellar light, and other considerations, ❋ John Tyndall (1856)
Thus the white powder, which has shown itself so powerful an absorber, has been specially selected on account of its extreme perviousness to the visible rays, and its extreme imperviousness to the invisible ones; while the dark powder was chosen on account of its extreme transparency to the invisible, and its extreme opacity to the visible, rays. ❋ John Tyndall (1856)
But permit the same two gases to unite chemically; then, without any augmentation of the quantity of matter, without altering the gaseous condition, without interfering in any way with the transparency of the gas, the act of chemical union is accompanied by an enormous diminution of its _diathermancy_, or perviousness to radiant heat. ❋ John Tyndall (1856)
It is a lesson on the principles of human nature; on the delusiveness of appearances; on the perviousness of fraud; and on the power with which nature has invested human beings over the thoughts and actions of each other. ❋ Charles Brockden Brown (1790)
