. A treatise on pharmacy for students and pharmacists. Frame for cloth or flannel strainers,known as tenaculum. Straining bag, showing position when in use. 134 GENERAL PHARMACY the washing and draining of bulky precipitates, a square cotton clothmay be stretched over a square frame called tenaculum, as shown inFig. 113 ; for smaller operations, such as straining infusions or decoc-tions, the cloth strainer may be fastened over a funnel by means ofwooden pinchcocks, and when it becomes necessary to strain withexpression, the ends of the strainer must be folded over and twistedin opposite direc
. A treatise on pharmacy for students and pharmacists. Frame for cloth or flannel strainers,known as tenaculum. Straining bag, showing position when in use. 134 GENERAL PHARMACY the washing and draining of bulky precipitates, a square cotton clothmay be stretched over a square frame called tenaculum, as shown inFig. 113 ; for smaller operations, such as straining infusions or decoc-tions, the cloth strainer may be fastened over a funnel by means ofwooden pinchcocks, and when it becomes necessary to strain withexpression, the ends of the strainer must be folded over and twistedin opposite directions, as shown in Fig. 114. A kind of cotton cloth Fig. Showing the manner of folding and expressing flannel or cloth strainers. known as cheese-cloth is preferred by mauy for strainers, as it allowsliquids to pass rapidly through it. All strainers should be wellwetted just before they are used, and those containing sizing shouldbe freed from the same by washing with hot water before they areput into use at all. For use at the dispensing counter in strainingsolutions, a pledget of absorbent cotton placed in the throat of afunnel will be found very convenient and serviceable; and, as nearlyevery solution prepared is likely to contain some specks and motes,this little operation should never be neglected. Some years ago a very serviceable oil filter was devised by WilliamR. Warner, which possesses the advantage of filtration under pres-sure, and is equally well adapted to syrups (see Fig. 115). The uppercylindrical vessel of tiuned iron is twenty-two inches high and teninches in diameter, with a flanch rim soldered on the bottom, ofrather les
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Keywords: ., bookcentury1800, bookdecade189, booksubjectpharmacy, bookyear1895
