A treatise on pharmacy : designed as a text-book for the student, and as a guide for the physician and pharmacist, containing the officinal and many unofficinal formulas, and numerous examples of extemporaneous prescriptions / by Edward Parrish.

Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on pharmacy : designed as a text-book for the student, and as a guide for the physician and pharmacist, containing the officinal and many unofficinal formulas, and numerous examples of extemporaneous prescriptions / by Edward Parrish. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    66/998 (page 52)
    Fi''. G9. Improved glnss funnel. A very simple but useful improvement in glass funnels bas been made of late years by grinding tbe smaller end of the neck off to an angle, as represented in Fig. 69. The liquid follows tbe neck to the lowest point, and does not have the tendency to flow back and close the space between the bottle neck and the tube of the funnel. For fil- tering volatile liquids the upper edge of the funnel should be ground to a level surface by rubbing on a flat stone with some fine emery ; this renders a piece of plate glass a tight cover when placed properly over it. Gutta-jDercha or vulcanized rubber has the advantage of light- ness and durability, and, not being affected by acids, leaves nothing to desire for the manufacture of a permanent funnel. The displacement (I'pparcLtus recommended in the previous editions of this work as almost indispensable to the pharmacist and physi- cian, may be well replaced by a funnel in almost every small operation. For details of the mode of preparing displacement tubes extemporaneously and managing the process, see the chapter on Displacement or Percolation. One or more evaporating dishes of Berlin or fine porcelain ware, and a porcelain cup (Fig. 71), will be found convenient in the pre- Fis. 70. Fis. 71. Fi; Evnponniiig liisli. Porcelaia cup. Capsule. paration of many of tbe galenical and most of the chemical prepa- rations appropriate to the office or shop. These dishes are of diflrerent prices according to quality, and range from the two gallon to the one fluidounce size. The flask. (Fig. 73) is a cheap and convenient implement for small operations requiring heat, and especially for forming solutions of saline ingredients. Fig. 73. Fio;. 74. The tripod (Fig. 74), or a retort stand, sold by dealers in apparatus, should not be forgotten, as being necessary to the convenient use of the foregoing. Vials.—The physician's outfit usually contains from half a gross to a gross of prescription vials, varying in size from f.^viij to f.^ss. As more of tbe smaller sizes are used than of tbe others, it is desirable to have about the following proportions in a gross: One doz. f5viij, one doz. fgvj, two doz. f5iv, three doz. fsij, three doz. J Flask. Tripod.