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Cantharidal Collodion

Take 8 marked astringency without the stimulating troy ounces finely powdered cantharides, properties of some of this class of salts. It press it firmly in a cylindrical percolator, and pour on it 14 pints stronger ether. When 15 fluid ounces have passed, set the liquid aside in a close vessel, and continue percolation with stronger alcohol until pint more liquid is obtained. Set this last aside to evaporate is easily assimilated when taken internally.

Dose, 3 to 6 grains, and while it controls excessive discharges, is often useful in correcting their cause. Though called an alum, this salt contains no alumina; it is similar to the double sulphate of potassa and iron, spontaneously until reduced to 1 fluid ounce; which is called iron alum, but is more then mix it with the reserved liquid. Next soluble. add 100 grains dry collodion cotton (see next

4739. Concentrated Infusion of receipt), and agitate until dissolved. (U. S. Roses. Rose petals or leaves, 3 pounds; Ph.) boiling water, 2 gallons; infuse 2 hours, with 4743. Το Prepare Gun Cotton for constant agitation, then press out the liquor Collodion. To 10 troy ounces nitrate of poin a very clean tincture press, strain through tassa, add 15½ troy ounces sulphuric acid, and flannel or a hair sieve, add diluted sulphuric stir until uniformly mixed. When cooled acid, 24 fluid ounces, agitate well, and filter below 122° Fahr., add 1/2 troy ounce cotton, through paper supported on coarse muslin; freed from impurities, stirring with a glass MEDICATED WATERS. rod; cover the vessel closely, and, after stand- | with diluted alcohol (1 part alcohol to 2 of ing 24 hours, transfer the cotton to a larger water) until the root is perfectly exhausted, vessel, and wash it, first with cold water until evaporate the resulting product over a waterresulting product over a waterthe washings cease to have an acid taste, and bath until it is of nearly the required consistof nearly the required consistthen wash with boiling water. Press it as ence of a good extract, then mix the powof a good extract, then mix the powdry as possible with the hand, pack it tightly dered resinous portion, while the fluid is still in a conical percolator, and pour on it warm, and stir constantly until cold. In this stronger alcohol until the remaining water is way the resin is intimately and smoothly displaced. Lastly, press it as dry as possible mixed with the extractive portion; is much with the hand. The cotton thus prepared, and dried at a temperature of 2120, weighs 336 grains.