Companion to the latest edition of the British pharmacopoeia : comparing the strength of its various preparations with those of the United States and other foreign pharmacopoeias to which are added non-official preparations and practical hints on prescribing / by Peter Squire.

  • Squire, Peter Wyatt, Sir, 1847-1919.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Companion to the latest edition of the British pharmacopoeia : comparing the strength of its various preparations with those of the United States and other foreign pharmacopoeias to which are added non-official preparations and practical hints on prescribing / by Peter Squire. Source: Wellcome Collection.

    349/480 (page 313)
    yOLUMETRIC SOLUTION OF IODINE. (Iodine,. I = 127 or I = 127.) Take of Iodine, 127 grains; Iodide of Potassium, 180 grains ; Distilled Water, a sufficiency: 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 bulk of 10,000 grain-measures. 1000 grain-measures of this solution contain x&th of an equivalent in grains (12'7 grains) of Iodine, and therefore correspond to 1'7 grains of Sulphuretted Hydrogen, 3*2 grains of Sulphurous, and 4*95 grains of Arsenious Acid. Grammes and cubic centimetres may be employed instead of grains and grain-measures, but for convenience x&th of the numbers should be taken. 100 cubic centimetres contain 1*27 grammes of Iodine, and correspond to 0*17 gramme of Sulphuretted Hydrogen, 032 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. Grains weight of Substance. s. Grain- measures of Vol. Sol. or Grammes weight of = Substance. \ C. C. of Vol. Sol. 808 or 0-40 = 80-8 1000 or 3-47 = 100-0 808 or 44-15 = 80-8 810 or 44-15 = 81-0 Acid. Arseniosum . . . 4*0 = „ Sulphurosum . . 34*7 = Liquor Arsenicalis . . 441*5 = „ Arsenici Hydro- ) ^^-j^.g ^ chloricus . . / VOLUMETRIC SOLUTION OF NITRATE OF SILVER. (Nitrate of SHver, AgO,NO5 = 170, or AgI3-O3=170.) Take of Nitrate of Silver, 170 grs.; Distilled Water, a sufficiency : put the Nitrate of Silver into the 10,000 grain flask, and, having half filled the flask with water, allow the salt to dissolve; then dilute the solution with more water until it has the exact bulk of 10,000 grain-measures. The solution should be kept in an opaque stoppered bottle. 1000 grain-measures of this solution contain x&th of an equivalent in grains (17 grains) of Nitrate of Silver. Grammes and cubic centimetres may be employed instead of grains and grain-measures, but for convenience x^th of the numbers should be taken. 100 cubic centimetres contain y^o^h of an equivalent in grammes (1*7 grammes) of Nitrate of Silver. It is used in testing the following substances :— British Weights Metrical Weights and Measures. and Measures. Grains weight of Substance. Grain- = measures of Vol. Sol. or Grammes weight of : Substance. C. C. of Vol. Sol. . . 270 = 1000 or 270 = 100-0 , . 10 = 840 or 1-0 = 84*0 . . 10 = 1613 or 1*0 = 161*3 Acid. Hydrocyan. . Potass. Bromid. . . Sodse Arsenias (dry) VOLUMETRIC SOLUTION OF OXALIC ACID. (Crystalhzed Oxalic Acid, 2HO.C4O6.4HO =126, or H2C204.2H20= 126.) Take of Purified Oxalic Acid, in crystals, quite dry, but not effloresced,