A guide to pharmacy and dispensing for nurses and women desirous of qualifying as dispensers / by C.J.S. Thompson.

  • Charles Thompson
Date:
[1916]
Catalogue details

Licence: In copyright

Credit: A guide to pharmacy and dispensing for nurses and women desirous of qualifying as dispensers / by C.J.S. Thompson. Source: Wellcome Collection.

    39/102 (page 29)
    funnel and the liquid carefully poured down the side of the filter to prevent the paper breaking. For straining a liquid, to remove any foreign substance or dirt that may have got into it, the medium used must depend upon the con- sistency of the liquid. For instance, for thick syrupy fluids, flannel or fine muslin may be used; for thin watery solutions, absorbent wool or tow is best, it being simply neces- sary to place the medium in the neck of the funnel and run the liquid through it. When it is necessary to filter a large quantity of liquid containing heavy solid matter, it is a good plan to use two thicknesses of paper, or place a second small filter paper arranged as a cap to strengthen the cone and prevent breakage. The folded filter paper should be somewhat smaller than the funnel in which it is placed, as a pro- jecting, badly cut, or torn filter, wastes the liquid both by absorption and evaporation. The paper itself should never be quite filled with liquid, but a margin of about an inch left at the top. When filtering liquids that rapidly evaporate on expo- sure to the air, such as alcohol, the top of the funnel should be covered. The pilF machine is the appliance used for rolling and cutting a mass into pills. It consists of two parts, one of which rests on the counter, while the other is used with the hands. The latter consists of a flat piece of wood about