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Updated: May 13, 2025
There is a process known called the stripping of wool, and it consists in destroying the colour of wool and woollen goods already dyed, in order that they may be re-dyed. Listen, however, to the important precautions followed: A nitric acid not stronger than from 3° to 4° Twaddell is used, and care is taken not to prolong the action more than three or four minutes. Action of Alkalis.
This receipt has been commonly sold for $5. Take 100 grams of laminated gold, mixed with 20 grams of hydrochloric acid; 10 grams of nitric acid; the liquid thus composed is placed over a moderate fire, and stirred constantly until the gold passes into the state of chlorine; it is then allowed to cool.
The ionization method of Sir Thomas Oliver is most useful both as regards cure and also prevention of chronic poisoning by lead. Fatal Dose and Fatal Period. Uncertain. Method of Extraction from the Stomach. Dry the contents of the stomach or portions of the liver, etc., and incinerate in a porcelain crucible. Treat the ash with nitric acid, dry, and dissolve in water.
This acid is usually prepared by distilling a mixture of sodium nitrate and vitriol in cast-iron retorts or pots, the nitric acid being collected in stoneware vessels connected one with another, or, as is more generally the case at the present time, in condensing apparatus consisting of stoneware pipes or coils cooled by water.
Thus fourteen parts of nitrogen will combine with sixteen of oxygen; and we have several substances in nature, called nitrous oxide, nitric oxide, nitric di-oxide, &c., which illustrate this, in which fourteen parts of nitrogen combine with sixteen oxygen or fourteen nitrogen with a multiple of sixteen oxygen, or a multiple of fourteen nitrogen combine with sixteen oxygen, and so on.
When cinchonine is distilled with solid potassium hydrate, it yields pyrrol and bases of both the pyridine and quinoline series. Cinchonidine, when heated with potassium hydrate, yields quinoline also, and with nitric acid the same products as cinchonine. Strychnine has been found to be a tertiary amine. When distilled with potassium hydrate, quinoline is formed.
Or the pen may be cleaned out with water and slipped into a holder made by rolling up a piece of corrugated packing-paper. If the point gets stopped up, stand the pen in nitric or sulphuric acid, which will probably dissolve the obstruction; and afterwards wash it out. Inks. I have found Stephens's coloured inks very satisfactory, and can recommend them. Paper and Cards.
It is said that a solution of cyanuret or prussiate of potash, is used instead of nitric acid in applying mercury to copper plates, and that it is still better, there being then no trouble with the green spots of nitrate of copper. A good amalgamated copper plate is considered as serviceable as a bed of quicksilver of equal size, and it is very much cheaper and more convenient to manage.
This acid may be obtained in a solid and dry state, called anhydrous sulphuric acid. The common sulphuric acid is made by burning sulphur, which forms sulphurous acid. To convert this into sulphuric acid and gain more oxygen, nitric acid, which is rich in that body, is added. It forms a limpid, colorless fluid, of a specific gravity of 1.8. It boils at 620 deg.; it freezes at 15 deg.
If you tickle the foot of a person asleep, and the foot is withdrawn by simple reflex action, the sleeper is unconscious alike of the irritation and of the movement, even as the decapitated frog is unconscious when a drop of nitric acid falls on his back and he lifts up a leg and rubs the place.
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