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The author has made use of tincture of iodin and glycerin in the proportion of one part of iodin to seven parts glycerin, with very satisfactory results. This combination is hygroscopic, anodyne and antiseptic and is easily applied.
His exhaled breath went to a tiny pump that forced it through a hygroscopic filter which at once extracted excess moisture and removed carbon dioxide. The same pump carefully measured a volume of oxygen equal to the removed CO2 and added it to the air it released. The pump made very small sounds indeed, and the valves were almost noiseless, but Joe could hear their clickings.
Even differences in hygroscopic properties that is to say, in the degree of avidity with which a mineral takes up moisture from the atmosphere may be made available for the purpose of effecting a commercially valuable separation.
One can conceive it provided in the future with cross-thread telescopic sights, the focussing of which, corrected by some ingenious use of hygroscopic material, might even find the range, and so enable it to be used with assurance up to a mile or more. It will probably also take on some of the characters of the machine-gun.
Here we were, now wetter than ever, cold as Polar bears, sitting in this hygroscopic catacomb at about 2 a.m. We longed for a fire; a fire was decided on. We had a fire bucket it had started life as a biscuit tin a few bits of damp wood, but no coke. "We had some coke, I'm sure! Why, of course we built it into the dam!" Down came the dam, out came the coke, and in came the water.
If the air is the vehicle of the germs of the disease, it will have to be filtered by means of a muslin curtain kept wet with a hygroscopic solution, glycerine for example.
The hotter the tar, the more rapid the saturation; the high degree of heat expels the air and evaporates the hygroscopic fluid in the pores of the paper. The strong heating of the tar causes another advantage connected with this method.
This is especially the case with some complex ores in which one constituent, on being roasted, acquires a much greater hygroscopic power than the others, the grains of the crushed and roasted ore becoming damp and sticky while those of the other minerals remain comparatively dry.
By mixing with an ore of this kind after it has been allowed to "weather" for a short time some finely-powdered magnetite the strongly hygroscopic constituents can be made practically magnetic, because the magnetic impalpable dust adheres to them, while it remains separate from the grains of the other minerals.
The most important hygroscopic as well as thermoscopic influence of the forest is, no doubt, that which it exercises on the humidity of the air and the earth, and this climatic action it exerts partly as dead, partly as living matter. These experiments embraced three series of observations continued respectively for periods of a year, a month, and two days.
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