Dr. Pereira's Elements of materia medica and therapeutics : abridged and adapted for the use of medical and pharmaceutical practitioners and students and comprising all the medicines of the British Pharmacopœia, with such others as are frequently ordered in prescriptions or required by the physician / edited by Robert Bentley and Theophilus Redwood ; with an appendix.

  • Jonathan Pereira
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Dr. Pereira's Elements of materia medica and therapeutics : abridged and adapted for the use of medical and pharmaceutical practitioners and students and comprising all the medicines of the British Pharmacopœia, with such others as are frequently ordered in prescriptions or required by the physician / edited by Robert Bentley and Theophilus Redwood ; with an appendix. Source: Wellcome Collection.

    88/1180 (page 56)
    Rub the iodine and the iodide of potassium well together, with the spirit, in a glass or porcelain mortar, add the lard gradually, and mix thoroughly.] The proportion of iodide of potassium is less by one-half than in the London ointment. [§ Vapor lodi. Inhalation of Iodine. Take of Tincture of Iodine . . . . 1 fluid drachm. Water . . . . . . .1 fluid ounce. Mix in a suitable apparatus, and having applied a gentle heat, let the vapour that arises be inhaled.] [§ Volumetric Solution of Iodine, (Appendix III.) Take of Pure Iodine, in powder . . . . 127 grains. Iodide of Potassium . . . .180 grains. Distilled Water . . . ■ . . a sufficiency. Mix the iodide of potassium and iodine in a bottle with eighteen ounces of the water ; agitate until both are dissolved, and when the solution is complete, add as much more distilled water as will make the total bulk exactly one pint. Put the iodide of potassium and the iodine into the 10,000 grain flask, fill the flask to about two-thirds its bulk with distilled water, gently agitate until solution is complete, and then dilute the solution with more water until it has the exact volume of 10,000 grain- measures ; 1,000 grain-measures of this solution contain -jQ-th of an equivalent in grains (12-7) of iodine, and therefore correspond to 17 grain of sulphuretted hydrogen, 3 '2 grains of sulphurous and 495 grains of arsenious acid. Grammes and cubic centimetres may be employed instead of grains and grain-measures, but for convenience TVth of the numbers should be taken. 100 cubic centimetres contain 1*27 gramme of iodine and correspond to 017 gramme of sulphuretted hydrogen, 0*32 gramme of sulphurous, and 0*495 gramme of arsenious acid. This solution is used for testing the following substances. It is dropped from the burette into the liquid to be tested until free iodine begins to appear in the solution. British Weights Metrical Weights and Measures. and Measures. r N f \ Grs. wt. of _ Gr.-meas. of „ G-rms. wt. of C.C. of Vol. Substance ~ Vol. Sol. or Substance ~ Sol. Acid. Arsenios. . 4*0 = 808 or 040 = 80'8 Acid. Sulphuros. . 347 = 1000 or 3*47 = 100-0 Liq. Arsenicalis . 441'5 = 808 or 44-15 = 80'8 Liq. Arsenici Hy- j ^ = ^ ^ ^ = ^ drocnloricus J