Part 395

«Nux Vomica Poison.»—

Oatmeal 1 pound Powdered nux vomica 1 ounce Oil of anise 5 drops Tincture of asafetida 5 drops

«Barium Poison.»—

Barium carbonate 4 ounces Sugar 6 ounces Oatmeal 6 ounces Oil of anise 4 drops Oil of caraway 4 drops

RAZOR PAPER: See Paper.

«RAZOR PASTES:»

See also Pastes.

The razor pastes, razor creams, etc., on the market, have for their cutting, or sharpening, agent jewelers’ rouge, or rouge and emery. When emery is used it should be ground to an impalpable powder and levigated.

I.—The simplest formula is a mixture in equal parts of rouge and emery powder, rubbed up with spermaceti ointment. Coke is also used as a cutting agent. Suet, prepared lard, in fact, any greasy or soapy substance, will answer for the vehicle.

II.—Melt 1,000 parts of beef tallow and pour 250 parts of oil to it. To this mixture, which is uniformly combined by thorough stirring, add in the same manner 150 parts of washed emery, 100 parts of tin ashes, and 50 parts of iron oxide. The stirring of these ingredients must be continued until the mass is cool, as otherwise they would be unevenly distributed. The leather of the strop should be rubbed with this grease, applying only small quantities at a time. This renders it possible to produce a very uniform coating, since little quantities penetrate the fibers of the leather more easily.

III.—Tin putty (tin ashes) 2 parts Colcothar 2 parts Forged iron scales or filings 1 part Pure levantine honing stone finely powdered 7 parts Beef suet 3 parts

All the ingredients with the exception of the suet should be finely powdered. The suet is melted, the ingredients poured in, and the whole thoroughly mixed to form a doughy mass.

IV.—Colcothar 1 1⁠/⁠2 parts Pumice stone 1 1⁠/⁠2 parts Graphite 4 1⁠/⁠2 parts Bloodstone (red hematite) 2 parts Iron filings 1 part

These ingredients are finely powdered, washed, and mixed with the following:

Grafting wax 2 parts Soap 2 parts Lard 2 parts Olive oil 2 parts

Naturally the fatty ingredients are to be heated before the solid substances are commingled with them.

The side of the blade to be polished should be treated with the following compositions:

a. Tin ashes (tin putty) rubbed down to a fine powder on a honing stone and mixed with axle grease.

b. Washed graphite mingled with olive oil.

REDUCERS: See Photography.

REDUCING PHOTOGRAPHS, SCALE FOR: See Photography.

REFLECTOR METAL: See Alloys.

«REFRIGERANTS.»

I.—Potassium nitrate 2 pounds Ammonium chloride 2 pounds Water 5 pints

II.—Potassium nitrate 2 1⁠/⁠2 pounds Ammonium chloride 2 1⁠/⁠2 pounds Sodium sulphate 4 pounds Water 9 pints

III.—Ammonia nitrate 4 pounds Water 4 pints

IV.—Sodium sulphate 8 parts Dilute hydrochloric acid 5 parts

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