where experience has shown that, owing to difference of climate or other circumstances, a modification of the directions is requisite. The double system of chemical notation adopted in the British Pharmacopoeia has been followed; and, in accordance with the plan pursued in that work, the formulae according to the old system are printed in the lighter Roman type (Al), and those according to the new system in the heavier Egyptian type (Al); when, however, the notation under the new, agrees with that under the old system, only that in the lighter Roman type has been inserted. With regard to weights and measures, it has not been deemed advisable to depart from the standard adopted by the British Medical Council. For the higher denominations of weights and fluid measures, the avoirdupois weight and imperial measure are respectively employed. The following are the weights and measures adopted in the Pharmacopoeia of India:—
Weights.
1 grain - - - gr.
1 scruple - - ℈i = 20 grains.
1 drachm - - drm. (ʒi) = 60 grains.
1 ounce - - oz. (℥i) = 437·5 grains.
1 pound - - lb. = 7000 grains.
Measures of Capacity.
1 minim - - min. (♏).
1 fluid drachm - fl. drm. (fʒi) = 60 minims.
1 fluid ounce - fl. oz. (f℥i) = 8 fluid drachms.
1 pint - - - O. = 20 fluid ounces.
1 gallon - - - C. = 8 pints.
The doses named are the average ones for adults, excepting when otherwise expressly noted; these, however, are liable to considerable modification, according to circumstances; and their regulation in each individual case must be left to the discretion of the practitioner.
