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It is prepared in the following manner: 1 lb. of tin is melted in a crucible, and 1/2 lb. of purified quicksilver added to it; when this mixture is cold, it is reduced to powder, and ground with 1/2 lb. of sal-ammoniac, and 7 ozs. of flower of sulphur, till the whole is thoroughly mixed; they are then calcined in a mattrass, and the sublimation of the other ingredients leaves the tin converted into the aurum mosaicum, which is found at the bottom of the glass, like a mass of bright flakey gold powder.
SMELLING BOTTLE. Reduce to powder an equal quantity of sal-ammoniac and quicklime separately, put two or three drops of the essence of bergamot into a small bottle, then add the other ingredients, and cork it close. A drop or two of æther will improve it. SMELTS. This delicate fish is caught in the Thames, and some other large rivers.
A. Muriatic acid, or muriate of ammonia, commonly called sal-ammoniac, introduced into a boiler, prevents scale to a great extent; but it is liable to corrode the boiler internally, and also to damage the engine, by being carried over with the steam; and the use of such intermixtures does not appear to be necessary, if blowing off from the surface of the water is largely practised.
I have here a cylindrical glass jar in which I place some sal-ammoniac and quicklime. I will wet it and heat it a little. That produces the pungent gas of ammonia. "On one side of this third piece of paper I myself write with this mercurous nitrate solution. You see, I leave no mark on the paper as I write. I fold it up and drop it into the jar and in a few seconds withdraw it.
Let me illustrate the action of the crystallizing force by two examples of it: Nitre might be employed, but another well-known substance enables me to make the experiment in a better form. The substance is common sal-ammoniac, or chloride of ammonium, dissolved in water.
"Hum," commented Craig, "this was apparently on the outside wrapper of a paper folded about some sal-ammoniac and quicklime. It goes on: "'Just drop the whole thing in, paper and all. Then if you feel a faintness from the medicine the ammonia will quickly restore you. One spoonful of the headache-powder swallowed quickly is enough."
"Hum," commented Craig, "this was apparently written on the outside wrapper of a paper folded about some sal-ammoniac and quicklime. It goes on: * "'Just drop the whole thing in, paper and all. Then if you feel a faintness from the medicine the ammonia will quickly restore you. One spoonful of the headache-powder swallowed quickly is enough."
Should any black or discoloured particles appear, they must be removed. The sal-ammoniac used here must be very white and clear, and the mercury quite pure and unadulterated. When a shade of deeper red is required, it can easily be obtained by grinding a very small quantity of red lead along with the above materials.
Take a small wine-glass full, when the gout is in the head or stomach; and if the pain be not removed, take two large spoonfuls more. Or take six drams of opium, half an ounce of soap of tartar, half an ounce of castile soap, one dram of grated nutmeg, three drams of camphor, two scruples of saffron, and nine ounces of sweet spirit of sal-ammoniac.
One man prefers heating the metal, then cooling it in the water of common beans, and heating it again for welding. Take of clean borings or turning of cast iron, 16 parts; of sal-ammoniac, 2 parts; and flour of sulphur, 1 part; mix them well together on a mortar, and keep them dry.
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