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Damp against the face of the walls may be partly combated by a careful selection of a non-absorbent brick with a hard face and by struck joints.
The penwiper was non-absorbent, and generally contrived to return the drop it refused to partake of on the hands of incautious scribes, who rarely obtained soap and hot water time enough to do any good. Miss Julia first remedied the ink. A memory of breakfast unremoved still hung about the parlour table a teapot and a slop basin.
Twist had been terribly worried up to the moment in the night when he got his great idea, and he was worried again, now that he saw the twins, by doubts. They didn't look as though they would easily be put to school. His idea still seemed to him magnificent, a great solution, but would the Annas be able to see it? They might turn out impervious to it; not rejecting it, but simply non-absorbent.
"A drop of blood from a living body falling upon any non-absorbent surface will, in the course of a few minutes, solidify into a jelly which will, at first, have the same bulk and colour as the liquid blood." "Will it undergo any further change?" "Yes.
All hems can be run on the machine. Though not everyone likes the "feel" of linen, most housekeepers are ambitious to include a certain amount with their other bed linens, for use in the summer or during illness, because of its non-absorbent qualities. Sheets cost $3, $3.50, $4, $5, $6, and on up to $17, the more expensive ones being embellished with hemstitching, scallops, or lace.
From these illustrations you will see how necessary it is that the brick and stone used for outer walls should be as far as possible impervious to wet; but more than that, it is necessary the jointing should be non-absorbent, and the less porous the stone or brick, the better able must the jointing be to keep out wet, for this reason, that when rain is beating against a wall, it either runs down or becomes absorbed.
Still the surface on which the drop falls is quite as much a factor as the height from which it falls. If the surface is rough the border may be irregular. But this was a smooth surface and not absorbent. The thickness of a dried blood-spot on a non-absorbent surface is less the greater the height from which it has fallen. This was a thick spot.
The best wall for a sick-room or ward that could be made is pure white non-absorbent cement or glass, or glazed tiles, if they were made sightly enough. Air can be soiled just like water. If you blow into water you will soil it with the animal matter from your breath. So it is with air. Air is always soiled in a room where walls and carpets are saturated with animal exhalations.
An interior wall finish of the hardest and most non-absorbent materials known for such uses is a valuable hygienic provision, and both safety and salubrity are further conserved by an absence of any hollow spaces between floors and ceilings, or in stud partitions. No vermin retreats, no harbors for rodents, no channels for flame exist.
Moreover, even though these objects remain moist, the spirochetes are likely to die out within six or seven hours, and may lose their infectiousness before this. Smooth, non-absorbent surfaces, especially of metal, are unfavorable for the germ. Wash-basins, dishes, silverware, and toilet articles are usually satisfactorily disinfected by hot soapsuds, followed by drying.
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