. Practical electricity in medicine and surgery. trode is alsospiral-shaped, but made of thin iron wire, which has beencopper- and afterward silver-plated; it is supported centrally inthe interior of the cylinder, A, by a cork at the neck of thelatter, and receives the current by a small clamp on a slidino-rod * Notes on New Remedies, from Fischers Zeitschrift f. Augewandte Chemie. ELECTROLYTIC ANALYSIS. 217 and a binding-screw, z, at its base, to connect with the zinc poleof the-battery. Tbe liquid to be analyzed, supposing it to contain mercury,after being weighed, then acidulated with 3 to
. Practical electricity in medicine and surgery. trode is alsospiral-shaped, but made of thin iron wire, which has beencopper- and afterward silver-plated; it is supported centrally inthe interior of the cylinder, A, by a cork at the neck of thelatter, and receives the current by a small clamp on a slidino-rod * Notes on New Remedies, from Fischers Zeitschrift f. Augewandte Chemie. ELECTROLYTIC ANALYSIS. 217 and a binding-screw, z, at its base, to connect with the zinc poleof the-battery. Tbe liquid to be analyzed, supposing it to contain mercury,after being weighed, then acidulated with 3 to 4 per cent, of sul-phuric acid, is contained in a funnel-shaped reservoir, which isconnected by a rubber pipe with It, by which it enters into thedecomposing cell, the influx of the liquid being regulated by aBunsen screw-clamp, so that one drop in about five secondsenters at h and is discharged at /, and the electric currentpassing the electrodes in the same direction. In the samemeasure as the liquid is passing upward, the mercury is precipi-. Fig. 178. Fig. 179. tated on the silver-plated cathode. After the liquid has passedthrough the cell, the rest left in the latter is discharged fromit by a current of pure water, until the generation of gasat the electrodes has entirely ceased. The negative spiral isthen removed from the cell, washed carefully with water, thenwith alcohol, and last with ether, and, perfectly dry, is separatedfrom the wire end, and transferred to a glass tube of six milli-metres diameter, open at the lower end, and open and drawn outto a narrow tube on top; the lower open end of this tube isthen sealed as in Fig. 179, d, the tube then carefully heated overa gas or alcohol flame to a red heat from the closed end, 218 PRACTICAL ELECTRICITY IN MEDICINE AND SURGERY. where the spiral is placed upward, and under continuousrevolving, until all the mercury precipitated on the spiral hasbeen volatilized, and appears as a sublimate at the narrow partof the tube. In
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectri, bookyear1890
