. An introduction to practical pharmacy: designed as a text-book for the student, and as a guide to the physician and pharmaceutist. With many formulas and prescriptions . nsiderable pressure is to be employed, as in extract-ing the juice from the pulp in making fruit syrups. Figs. 79 and 80 represent an apparatus I have been using forsome time past for straining syrups. Fig. 79 is a tin bucket, intowhich a funnel-shaped wire support, Fig. 80, is suspended, restingon the bucket by a projecting rim at the top ; a jelly bag is hereunnecessary, as a sufficiently large square or round piece of fla
. An introduction to practical pharmacy: designed as a text-book for the student, and as a guide to the physician and pharmaceutist. With many formulas and prescriptions . nsiderable pressure is to be employed, as in extract-ing the juice from the pulp in making fruit syrups. Figs. 79 and 80 represent an apparatus I have been using forsome time past for straining syrups. Fig. 79 is a tin bucket, intowhich a funnel-shaped wire support, Fig. 80, is suspended, restingon the bucket by a projecting rim at the top ; a jelly bag is hereunnecessary, as a sufficiently large square or round piece of flannellaid upon the wires will assume a convenient position for use. FILTRATION. 79 Tig. 81 represents in section a contrivance for straining jellies,attributed to the late Dr. Physick, and made by Isaac S. Williams,of Philadelphia; a wire support fits into a funnel, which is solderedinto a vessel designed to be kept full of hot water so as to preventthe cooling and thickening of the jelly during straining. For ordinary aqueous, alcoholic, and ethereal liquids, the processof filtration, employing the term in its more limited sense, is used, Fig. 79. Fig. 80. Fig. Apparatus for straining syrups, Ac. Physicks jelly strainer. the filtering medium being paper. The best filtering paper is porousand free from any kind of glazing; that made from cotton or linenrags is the best for ordinary purposes; the kind made from woollenmaterials seems better adapted to viscid liquids, being thicker andmore porous, but seldom free from coloring matter. It is, also,more soluble in alkaline solutions, and unfit for filtering such. It is often difficult to meet with paper combining the requisitestrength, permeability, and freedom from coloring principles toanswer a good purpose for filtering. The best that I have seen isimported, and is almost too expensive for common use. The construction of paper filters is an extremely simple thingwhen once learned, and is easily taught the student by a practi
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectpharmacy, bookyear185
