MU – PA

II.—Black and white mustard, in No. 60 powder, deprived of fixed oil. 1 part. Benzol solution of India rubber (1 in 40). 4 parts. Mix to a smooth mass, and spread the same over one side of a suitable paper by means of a plaster-spreading machine, or passing the paper over the mass contained in a suitable shallow vessel. Expose to warm air for a short time to dry. Preserve the dry paper in well-closed boxes. It may be useful to know that mustard paper, after spreading, should not be long exposed to light and air. By so doing not only does the mustard bleach but the rubber soon perishes. Moreover, mustard paper is hygroscopic, so that in a moist atmosphere it soon loses its virtue. It is, therefore, highly important that mustard paper should be rapidly dried in a warm atmosphere with free ventilation, then at once stored in well-closed packets. Thus prepared they keep well and remain active for many years. MUSTARDS.— See Condiments. MYRRH ASTRINGENT.— See Dentifrices. NAIL, INGROWING.— Copious applications of dried powdered alum are sufficient to cure every case of ingrowing nail in about 5 days. The applications are not painful in the least, and the destruction of the pathologic tissue results in the formation of a hard, resistant, and non-sensitive bed for the nail, a perfect cure for the ingrowing tendency. Apply a fomentation of soap and water for 24 hours beforehand and then pour the alum into the space between the nail and its bed, tamponing with cotton to keep the alum in place, and repeating the application daily. The suppuration rapidly dries up, and pain and discomfort are relieved almost at once. NAIL POLISHES.— See Cosmetics. NAPOLEON CORDIAL.— See Wines and Liquors. NAPHTHOL SOAP.— See Soap. NEATSFOOT OIL.— Place in a clearing flask, agitate vigorously and allow to stand for 8 days in a warm room with daily repetition of the shaking. Then draw off the spirit of wine on top, rinse again with 1,000 parts of spirit of wine (90 per cent) and place the oil in a temperature of about 53 1/2° F. Allow to stand in this temperature for at least 6 weeks, protected from the light, and then filter. NEEDLES, ANTI-RUST PAPER FOR.— See Rust Preventives. NEGATIVES, HOW TO USE SPOILED.— See Photography. NERVE PASTE.— See also Dental Cements, under Cements. After the nerve is destroyed the following paste is to be put in the cavity: NERVINE OINTMENT.— See Ointments. NESSELRODE PUDDING.— See Ice Creams. NETS.— See Cordage. NICKEL-TESTING.— Pure nickel will remain nearly white, while "patent nickel," or nickel-copper will not retain its primitive brilliancy, but soon becomes slightly oxidized and grayish in color. The magnet furnishes a good means of testing. The unadulterated nickel is distinctly sensitive to magnetism, while that much alloyed is destitute of this property. NICKEL ALLOYS.— See Alloys. NICKEL, TO REMOVE RUST FROM.— See Cleaning Preparations and Methods. NICOTINE STAINS, TO REMOVE FROM HANDS.—