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Sharp seven the train goes. I'll bring a bottle of nitre in my bag," and she bustled out. Grey looked after her. Strong, useful, stable: how contented and happy she had been since she was born! Love, wealth, coming to her as matters of course. The girl looked out of the dingy window into the wearisome gray sky. Well, what was the difference between them?
For though thou wash thee with nitre, and take thee much soap, yet thine iniquity is marked before me, saith the Lord GOD. How canst thou say, I am not polluted, I have not gone after Baalim? see thy way in the valley, know what thou hast done: thou art a swift dromedary traversing her ways;
If you possess a microscope you may watch the growth of crystals yourself by melting some common powdered nitre in a little water till you find that no more will melt in it. Then put a few drops of this water on a warm glass slide and place it under the microscope.
These terms, of course, were in the Galenic practice. In "The Queen's Closet" all the physic was found afield, with the exception of the precious metals and one compound, rubila, which was made of antimony and nitre, and which was in special favor in the Winthrop family as many of their letters show.
He showed me a bag of nitre, very white, but the crystals were much smaller than common. They procure it in considerable quantities from the ponds which are filled in the rainy season, and to which the cattle resort for coolness during the heat of the day.
If he were not in the field he was of her legislatures; if not there, then doing his duty in some civil office; if not there, wrestling with the management of worn-out railways; or, cool and keen, concerned in blockade running, bringing in arms and ammunition, or in the Engineer Bureau, or the Bureau of Ordnance or the Medical Department, or in the service of the Post, or at the Treasury issuing beautiful Promises to Pay, or at the Tredegar moulding cannon, or in the newspaper offices wrestling with the problem of worn-out type and wondering where the next roll of paper was to come from, or in the telegraph service shaking his head over the latest raid, the latest cut wires; or he was experimenting with native medicinal plants, with balloons, with explosives, torpedoes, submarine batteries; or thinking of probable nitre caves, of the possible gathering of copper from old distilleries, of the scraping saltpetre from cellars, of how to get tin, of how to get chlorate of potassium, of how to get gutta-percha, of how to get paper, of how to get salt for the country at large; or he was running sawmills, building tanneries, felling oak and gum for artillery carriages, working old iron furnaces, working lead mines, busy with foundry and powder mill.... If he was old he was enlisted in the City Guard, a member of the Ambulance Committee, a giver of his worldly substance.
An aloetic physic-ball, however, was given every fifth day, and a ball, composed of tartrate of iron, digitalis, nitre, and antimonial powder, on every intermediate morning and night. The water evidently accumulated; the dog was sent for, and died in the course of a week.
The regulus of cobalt, dissolved in spirit of nitre, gives a red. These colors disappear at longer or shorter intervals after the material written upon cools, but again become apparent upon the reapplication of heat. "I now scrutinized the death's-head with care. Its outer edges the edges of the drawing nearest the edge of the vellum were far more distinct than the others.
Others test the quality from time to time of that which has been purged and crystallized. It was the native nitre of the country on which they were occupied, and the test was its deflagration.
Young students in chemistry, when they learn that nitrogen is distinguished by the weakness of its affinities for other elements, and its consequent great inertness as a chemical agent, are often astonished to find that its compounds such as nitric acid, nitre, which gives its explosive character to gunpowder, nitro-glycerine, gun-cotton, and various other explosive substances which it helps to form are among the most remarkable in nature for the violence and intensity of their action, and for the extent to which the principle of vitality avails itself of them as magazines of force, upon which to draw in the fulfillment of its various functions.
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