Elements of pharmacy, materia medica, and therapeutics. / By William Whitla.
- William Whitla
- Date:
- 1882
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 University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![Fig. 9. moving every crease, and preventing the mass of the powder causing a bulging in the middle. This is always necessary when the powder weighs more than a scruple, and it is espe- cially necessary when any considerable number is ordered to be dispensed in a box or envelope. Care is requisite in pass- ing the spatula over bulky powders to keep the blade per- fectly flat or horizontal, as otherwise its edge will readily tear through the paper. Very large powders, containing substances like ilochelle salt, soda, &;c., can be uniformly flattened by striking them gently several times with the handle of the knife before passing the blade over them. Pharmacists, however, nearly universally fold a ]iowder in this way :—The dispenser places the pajjcr before him on the counter or table with the powder in its centre, and brings the border of the paper furthest from him within half an inch of the border next him ; secures it in this position with his index fingers, whilst with his thumbs he turns the half inch of margin of the paper next him in a flap over it. This is again folded over on itself, which completes the folding (Fig. 10) the ends being turned down as in the first instance by the fingers, over a knife or on a powder folder.](https://iiif.wellcomecollection.org/image/b21507296_0037.jp2/full/800%2C/0/default.jpg)
