Elements of pharmacy, materia medica, and therapeutics / by William Whitla.

  • Whitla, William, 1851-1933.
Date:
1884
Catalogue details

Licence: Public Domain Mark

Credit: Elements of pharmacy, materia medica, and therapeutics / by William Whitla. Source: Wellcome Collection.

Provider: This material has been provided by the Gerstein Science Information Centre at the University of Toronto, through the Medical Heritage Library. The original may be consulted at the Gerstein Science Information Centre, University of Toronto.

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    round the sides of the mortar always in the direction inwards or towards the dispenser, never oflE him. If syrup or mucilage is ordered to help the suspension of such powder in a mixture, it is advisable to rub the powder up with it first be- fore adding water, and shaking all thoroughly before labelling. Fig. 7. When calcined magnesia is ordered in a mixture, an ex- ception to the above rule of rubbing in a mortar may be made: thus, suppose an 8 oz, mixture, with 2 ounces of syrups or tinctures, 2 drams of magnesia, and 6 ounces of water, be prescribed, here the dispenser may measure the water first in a large measure, weigh the magnesia and drop it on to the surface of the water, when it will gradually sink to the bottom as a perfectly smooth and uniform sediment. During its sinking he measures out the fluid ingredients, pours them into the bottle in which they are to be dispensed, by which time the magnesia and water are ready for pouring in on the top of them. This completes the mixture, which is whiter and more uniform than if rubbed up in a mortar, however clean. Often a good deal of trouble is experienced with the froth that rises, especially upon vegetable solutions after agitation, preventing the bottle being filled or corked. A few drops of