File:American journal of pharmacy (1881) (14595932087).jpg

Identifier: americanjour534111881phil (find matches)
Title: American journal of pharmacy
Year: 1835 (1830s)
Authors: Philadelphia College of Pharmacy Philadelphia College of Pharmacy and Science
Subjects: Pharmacy Pharmacology
Publisher: Philadelphia : Philadelphia College of Pharmacy
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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ll have its attraction of gravitation largely overcome bycapillary and osmodic attraction, and must, in a comparative sense, gothrough the cells and into them at nearly the same rate as it goesaround them and by them. It was in endeavoring to solve some of these problems of percola-tion, more especially the means of overcoming the swelling of the-drug, that I have been led to construct the new percolator and processdescribed and illustrated below. How well it is adapted to meet thedifficulties we encounter will be easily seen. I have simply reversed the ordinary percolator,, attaching a long;tube (rubber usually answers) to the nozzle, and connected it to the^ Am. Jour. Pharm. 1Nov., 1881. J A Neio Percolator. 569* menstruum reservoir^ C, Fig. 1, though, of course, a funnel or similarapparatus would answer. Fig. 1 represents the percolator in positioiij,.ready for the liquid to flow. Fig. 2 represents the percolator pro-per, with the open end, E, apart, and ready for packing the drug.
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Fig. 1. Fig. 2. The Inverted Percolator. The porous diaphragm, B, Fig. 2, G, Fig. 1, is first placed in posi-tion, the drug is, after^previous moistening, packed tightly into thepercolator occupying the dotted space, C, Fig. 2, and H, Fig. 1. Aporous diaphragm, D, Fig. 2, J, Fig. 1, is placed on the drug andi^L 270 A Nev) Percolator. f Am. Jour.Pharm.1 Nov., 1881. fastened to the body of the percolator by any simple contrivance. Ihave it secured by a lock and key, working on an eccentric (not shownin the dniwing), which firmly holds the diaphragm in any positionmade necessary in the cylinder by the varying height of the drug. The bottom plate, H, Fig. 2, Ij, Fig. 1, is easily secured to thebody of the cylinder, and the bottom or outlet tube is easily closedwith a cork or rubber tube and pinch-cock. Now, the percolator hav-ing been packed very tightly on the bottom, and less so proceedingupward, the diaphragm holding the drug in place having a piece ofmuslin or filtering medium placed

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