Pack the Black Mustard in a conical percolator, and gradually pour Benzin upon it until the percolate ceases to produce a permanent, greasy stain upon blotting paper. Remove the powder from the percolator, and dry it by exposure to the air. Having meanwhile dissolved the India-Rubber in a mixture of 100 C.c. [old form 10 fl. oz.], each, of Benzin and Carbon Disulphide, mix the purified Mustard with a sufficient quantity of the solution to produce a semi-liquid magma, and apply this, by means of a suitable brush, to one side of a piece of rather stiff, well-sized paper, so as to cover it completely, and then allow the surface to dry. A surface of sixty square centimetres [old form 91 square inches] should contain about 4 Gm. [old form 62 grains] of Black Mustard deprived of oil. Before it is applied to the skin, Mustard Paper should be dipped in warm water for about fifteen seconds. QUESTIONS ON CHAPTER LXVII. SOLID EXTEMPORANEOUS PREPARATIONS. What are cerates? Why are they so called? How are cerates made? How many cerates are official? Give the formulas and official processes for the following cerates, viz. : Give the synonyme. Camphor cerate-Give the Latin official name. In what different ways are ointments made? Give the synonyme. Give the synonyme. In making ointments by fusion, what precaution is necessary? How are ointments made by incorporation? What official ointment is made by chemical reaction? What three maxims should be observed in making or dispensing ointments? Ointment of tannic acid-Give the Latin official name. Tar ointment-Give the Latin official name. Give the synonyme. Ointment of lead carbonate-Give the Latin official name. Ointment of potassium iodide-Give the Latin official name. Give the synonyme. Stramonium ointment-Give the Latin official name. How may a neat finish be given to ointments in boxes? What are plasters? What is the basis of most of the official plasters? How many plasters are official? Give the synonyme. Give the formulas and modes of making the following plasters, viz. : Give the synonyme. Upon what substances are plasters usually spread? Give the synonyme. What is the method of proceeding in spreading a plaster upon leather? How are blisters spread? What is a good material upon which to spread them? What are chartæ or papers? How many are official? How is potassium nitrate paper prepared? How is mustard paper prepared? How is mustard paper used? How much mustard does each square inch contain? PART VI. FORMULARY OF UNOFFICIAL THE following formulas have been collected principally with the view of saving the labor and time of the pharmacist, who is often suddenly called upon to prepare some remedy for which he may not have a formula in his recipe-book. The author's name is appended to the formula when it is known, and the selection has been carefully made so as to embrace many which are not easy of access. The subjects are arranged according to the order adopted for the official preparations in Parts III. and IV., and, if desired, they may be consulted in connection with the subjects in those parts. The formulas of the preparations of the U.S. Pharmacopoeia, 1880, which were not admitted to the present Pharmacopoeia, have been added, because many of them are still in active use. As it is very desirable to secure uniformity in practice throughout the United States in the use of unofficial preparations, the National Formulary has been added, and the formulas for many of the preparations which were inserted in the first edition of this work which conflict with these have been dropped. The National Formulary preparations are distinguished by the letters N. F., and the original number of the preparation in the Formulary will be found before the title. Warren's Styptic. Sulphuric Acid, Sulphuric Acid Mixture. Mixtura Sulphurica Acida (Germ. Pharm.). Sulphuric Acid, 1 part. Alcohol, enough to make 4 parts. Add the Acid very gradually to three (3) parts of Alcohol, contained in a flask, agitating after each addition, and taking care that the temperature of the mixture be not allowed to rise above 50° C. (122° F.). When the mixture is cold, add enough Alcohol, if necessary, to make four (4) parts. 5 fl. dr. 4 fl. dr. 4 fl. dr. To the Sulphuric Acid, contained in a Wedgwood mortar, slowly add the Oil of Turpentine, in small portions at a time, constantly stirring. Allow the mixture to cool, then add the Alcohol cautiously, in the same manner, and continue stirring until no more fumes arise. When the liquid is cold, pour it into a glass-stop-quantities are required for immediate use in a pered bottle. Note.-The same product may be obtained, approximately, by carefully and slowly adding 1 volume of Sulphuric Acid to 7 volumes of Alcohol, and this method may be used when small prescription. 4. Acidum Metaphosphoricum Di- Diluted Metaphosphoric Acid. Acidum Phosphoricum Glaciale Dilutum. Diluted Glacial Phosphoric Acid. Glacial Phosphoric Acid, 780 gr. Distilled Water, enough to make 16 . oz. Dissolve the Acid in the Water, without heat. This preparation should be kept in a cool and dark place, and should not be prepared in larger quantity than may be consumed within a few months. Note.-The resulting product contains about 10 per cent. of metaphosphoric acid, provided the glacial acid was free from impurities. That which is sold in form of glassy lumps is usually of sufficient purity. The variety in form of round sticks is more or less impure, containing generally more than 15 per cent. of phosphate of sodium. If this variety is alone available, a proportionately larger quantity must be taken, to be determined, if time permits, by an assay of the free acid present. If no special accuracy is required, about 900 grains of this variety of the acid may be reckoned to be equivalent to the quantity directed in the above given formula. Whenever Pyrophosphate of Iron (U. S. P.) forms one of the ingredients of a mixture containing Diluted Phosphoric Acid, the officinal tribasic acid is unsuitable, as it produces with the salt a gelatinous precipitate. If a clear mixture is required, the above preparation is to be used in place of the officinal. The same may be done when Phosphate of Iron (U.S. P.) is prescribed, though the precipitate caused by the officinal acid in this case is not as bulky, and under certain conditions may not form at all. Heat the Glycerin in a tared porcelain capsule to a temperature not exceeding 150° C. (302° F.), and add the Boric Acid in portions, constantly stirring. When all is added and dissolved, continue the heat at the same temperature, frequently stirring, and breaking up the film which forms on the surface. When the mixture has become reduced to a weight of one hundred (100) parts, pour it out on a flat surface previously coated with a very small quantity of petrolatum, let it cool, cut it into pieces and transfer them immediately to bottles or jars, which should be well stoppered. Note.-When a solution of Boroglycerin is required, it is preferable to prescribe or to dispense the Glycerite of Boroglycerin. (See Glyceritum Boroglycerini, No. 184, next formula.) 184. Glyceritum Boroglycerini. N. F. Glycerite of Boroglycerin. Glycerite of Glyceryl Borate. Solution of Boroglyceride. Boric Acid, in powder, 62 parts. Glycerin, enough to make 200 parts. Heat ninety-two (92) parts of Glycerin in a tared porcelain capsule to a temperature not exceeding 150° C. (302° F.), and add the Boric Acid, in portions, constantly stirring. When all is added and dissolved, continue the heat at the same temperature, frequently stirring, and breaking up the film which forms on the surface. When the mixture has been reduced to the weight of one hundred (100) parts, add to it one hundred (100) parts of Glycerin, mix thoroughly, and transfer it to suitable vessels. Two parts, by weight, of this preparation represent 1 part of solid Boroglycerin. Note. The product, which is a clear, viscid liquid, is more readily soluble in, and miscible with, other liquids than the solid Boroglycerin. (See Boroglycerinum.) It may be found more convenient, if the glyeerite is needed immediately, to place one ounce (av.) of boroglyceride in a dish and add one ounce (av.) of glycerin, heating gently and stirring until it is dissolved. BROMINE. Antidote to the Poison of the Rattle 240 gr. 240 gr. 1 oz. (troy). snake. 1 fl. oz. 2 fl. dr. Corrosive Chloride of Mercury, 1 gr. Diluted Alcohol, 4 fl. oz. Boric Acid Ointment. Boroglyceride, White Wax, Vaseline, 240 gr. 3 fl. oz. Heat the Wax and Vaseline together, and while hot add the Glyceride slowly; use constant stirring while cooling. 10. Boroglycerinum. N. F. 80 gr. 2 fl. oz. Dissolve the Potassium Bromide in about 1 fl. oz. of the Distilled Water, add the Bromine, agitate, and finally add the remainder of the Distilled Water. It should be kept in small, ground-stoppered vials. Dose, 1 to 2 drops. 208. Liquor Bromi. N. F. Bromine, Note.-As bromine vapor is very injurious to the respiratory passages and destructive to balances, it is often preferable to take the contents of an original bottle of Bromine-weighing the bottle, both before opening it and after emptying it, in order to ascertain the exact weight of the Bromine contained therein-and then to use a quantity of Bromide of Potassium and of Water proortionate to the quantities above given. IODINE. 222. Liquor Iodi Causticus. N. F. Mix. See next formula. Iodide of Potassium, 2 tr. oz. 4 fl. oz. Water, Iodized Oil of Bitter Almond. Oil of Bitter Almond, Mix, and shake occasionally for two months. Unguentum Iodinii Compositum. U.S. 1870. COMPOUND IODINE OINTMENT. Iodine, Iodide of Potassium, Lard, 15 gr. 30 gr. 30 min. 1 oz. (troy). incorporate Dissolve the Iodine and Iodide of Potassium in the Water, then the solution with the Lard. enough to make 16 fl. oz. Dissolve the Iodide and Hypophosphite of Potassium in one-half (1) fluidounce of Water, and the Tartaric Acid in one-half (3) fluidounce of Diluted Alcohol. Mix the two solutions in a vial, cork and shake it well, and then place it in ice-water for about half an hour, or longer, if convenient; again shake it thoroughly, and then pour the mixture upon a small white filter contained in a funnel, the stem of |