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Updated: June 14, 2025
The loss of weight experienced is essentially equal to the loss of the wool fiber. If the filtrate is saturated with hydrochloric acid, the dissolved wool fiber separates again, and after having been collected upon a weighed filter, it may be weighed and the quantity ascertained.
Evaporate the filtrate to a syrup, and extract with successive portions of absolute alcohol. Filter through a filter moistened with alcohol. Evaporate filtrate to dryness, and dissolve residue in water, the solution being made distinctly acid. Now shake watery solution with ether.
Decant the solution through a filter, wash the precipitated copper twice by decantation with hydrogen sulphide water, and finally transfer the copper to the filter paper, where it is again washed thoroughly, being careful at all times to keep the precipitated copper covered with the wash water. Remove and discard the filtrate and place an Erlenmeyer flask under the funnel.
Well, if they'll take the contents of the stomach, in alcohol, with a little water acidulated, strain off the filtrate and try it on a dog, they will see that its effect is the effect of digitalis. Digitalis is an accumulative poison and a powerful stimulant of arterial walls, by experimental evidence an ideal drug for the purpose of increasing blood pressure.
Under such conditions the advantages accruing from the removal of the first filtrate are obvious, both as regards the diminished volume requiring refiltration, and also the smaller number of washings subsequently required.
Mix the filtrate with a sufficient quantity of finely levigated vermilion until a rather thick liquid is obtained. Write with a quill, or gold pen, and then touch the reverse side of the fabric with a hot iron, coagulating the albumen. It is claimed that marks so made are affected by neither soaps, acids nor alkalies.
A nervous, irritable, subtle organization gives them a power for waking, without apparent fatigue, refused to most men. And yet, when a strong emotion causes its corrosive waters to filtrate into the veins of these impressionable beings, it trickles there drop by drop, until it has hollowed out in the very depths of their hearts a lake full of trouble and storms.
The little room obtained its daylight mainly from the street-door when it was open, for the one tiny window on the right as you entered was not constructed to open, and its dulled glass masked more of daylight than it allowed to filtrate through. Opposite the window a narrow door led into a couple of living rooms, the first of which also had direct access to the street.
But their times and effects appear to lie beyond the reach of human curiosity; and the philosopher will discreetly abstain from the prediction of earthquakes, till he has counted the drops of water that silently filtrate on the inflammable mineral, and measured the caverns which increase by resistance the explosion of the imprisoned air.
Recently government investigators have discovered that they are bodies that can be isolated by a special process from the filtrate of brewer's yeast by Lloyd's reagent. Five grams of this" he held up some of the tablets he had made "for a sixty- kilogram person each day are sufficient. Unknown to you, I have introduced some of this substance into the food already deficient in vitamines.
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