. A treatise on pharmacy for students and pharmacists. latic still. The Prentiss Alcohol-reclaimer (Fig. 167) is easily operated. Itis made of tinned copper, and is provided with an upright column, B, 168 GENERAL PHARMACY. screwed to the top of the still, in which is placed a rod carrying aseries of perforated tin disks intended to increase the alcoholic strengthof the distillate by condensing the aqueous vapor, which then returnsto the still, while the vapor of alcohol passes on to the condenserproper. The vapor passes from the column through a short tube, c,to the condenser, which consists o
. A treatise on pharmacy for students and pharmacists. latic still. The Prentiss Alcohol-reclaimer (Fig. 167) is easily operated. Itis made of tinned copper, and is provided with an upright column, B, 168 GENERAL PHARMACY. screwed to the top of the still, in which is placed a rod carrying aseries of perforated tin disks intended to increase the alcoholic strengthof the distillate by condensing the aqueous vapor, which then returnsto the still, while the vapor of alcohol passes on to the condenserproper. The vapor passes from the column through a short tube, c,to the condenser, which consists of a twelve-ounce copper can, d,containing a tube bent zigzag, and supplied with cold water by meansof a funnel tube, E, reaching to the bottom of the can. The dis- FlG. 100-gallon copper still, with upright condenser. tillate is collected at the outlet, G, a continuation of the zigzag con-densing tube, while the waste-water flows out at f, which is con-nected with the sink by means of rubber tubing. The Anderson Automatic Still, Fig. 168, differs from the othersdescribed, in the continuous automatic supply of water to the water-bath. The refrigeration of vapor is effected by a free circulation ofwater between the walls of the cone-shaped condenser, as in theBeck still, the distillate collecting in a gutter at the base of the water in the condenser gradually becomes warm and flows intothe water-bath, which is kept filled to a uniform height by means of SEP. TION OF 1VLATILE M. L TTER 169 an overflow pipe, and thus the necessity of replenishing the boilerwith cold water from time to time, in large operations, is liquid to be distilled is heated in a broad, shallow evaporatingdish, from which the alcoholic vapors rise rapidly
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Keywords: ., bookcentury1800, bookdecade189, booksubjectpharmacy, bookyear1895
