. American journal of pharmacy . t intended to be ad captandum, for it would be very hurtful to con-tinue in the present to underrate a problem which has been so verymuch underrated in the past. If the principles involved, and the diffi-culties of carrying them out, be once fairly comprehended, the mechan-ical appliances may be easily varied, and yet must still leave some onecontrivance as the best until a better be found. No better form of apparatus has been found by the writer than thatwhich has now been used, upon various scales, during the past twelveyears, an account of which was publishe
. American journal of pharmacy . t intended to be ad captandum, for it would be very hurtful to con-tinue in the present to underrate a problem which has been so verymuch underrated in the past. If the principles involved, and the diffi-culties of carrying them out, be once fairly comprehended, the mechan-ical appliances may be easily varied, and yet must still leave some onecontrivance as the best until a better be found. No better form of apparatus has been found by the writer than thatwhich has now been used, upon various scales, during the past twelveyears, an account of which was published in 1872, and which is repro- Fluid Extracts by Repereolation. {A\ty%£7\**m- duced with improvement and amplification at the end of this simplify this apparatus with the slightest possible sacrifice of theprinciples involved, with the object of getting the principles to bebetter and more generally understood and applied where so muchneeded, is the object of introducing the modified apparatus shown inthe following Scale, one-sixth of the actual linear size. The cut presents three separate groups of apparatus in positions toillustrate three stages of repercolation, and it is to be understood that Amil™\wm} Fluid Extracts by Repercolation. 235 all intermediate positions are often useful and necessary even in thesame percolation. The support is a common apparatus stand, therings of which are reduced to the proper size by short sections of rub-ber-tubing cut open and placed on the wire of the ring when needed ;or, a section of larger tubing stretched over the percolator as in Fig. percolators are common lamp chimnies costing about 5 cents each,and are of the size and form known technically as A and B Sun Chimneys. These are of very good form, though not the best,—for percolators, and should be selected with as small an opening forthe stopper as possible, and with the smoothest, thickest and most reg-ular edge, since it is practically impossible to stop som
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Keywords: ., bookcentury1800, bookdecade183, booksubjectpharmacy, bookyear1835
