Practical prescribing and dispensing for medical students / by William Kirby.

  • Kirby, William.
Date:
1904
Catalogue details

Licence: In copyright

Credit: Practical prescribing and dispensing for medical students / by William Kirby. Source: Wellcome Collection.

    18/188 page 14
    Household measures—Compare the teaspoons, dessertspoons and tablespoons with their equivalents in drachms. Observe how greatly they vary from those equivalents. Count the number of drops required to measure one fluid drachm of each of the following:—Spirit of nitrous ether; tincture of ginger; tincture of digitalis; glycerin; simple syrup. In measuring notice that the measure has graduation marks on the opposite sides; these must be in a line with each other and with the eye. The liquid will exhibit at its surface two lines-—an upper and a lower one; it is the latter, forming the bottom of the meniscus, which is regarded as giving the true measure.* Write with appropriate symbols the following quantities:—Thirty grains; two and a half scruples; half a pint; seven fluid ounces; two ounces; sixteen minims; four drachms. * On the Continent all medicines (solids and liquids) are dispensed by weight according to the metric system ; but the patient is directed to take the liquid ones by the spoonful. It will be seen that the different specific gravities of the drugs make accurate dosage a more difficult matter than it is in this country.
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