Journal . ht. On the under side of this the tubeC D has a small hole X, and the lower end is cut offobliquely. The large C tube A 1! i~ tilled with mercuryto within 4cm. of the end B, and 2cm. of a end is closed by means of a cork, whichis kept in its place by a brass screw cap. If, beforeputting in the cork, the tube A I! be sloped until the liquidrises to the edge, the cork may be put in without anyair being between it and the liquid. When now thelower part of the regulator is heated above the boilinu-point of the liquid, the mercury niveau is regulated bythe elastic force of the
Journal . ht. On the under side of this the tubeC D has a small hole X, and the lower end is cut offobliquely. The large C tube A 1! i~ tilled with mercuryto within 4cm. of the end B, and 2cm. of a end is closed by means of a cork, whichis kept in its place by a brass screw cap. If, beforeputting in the cork, the tube A I! be sloped until the liquidrises to the edge, the cork may be put in without anyair being between it and the liquid. When now thelower part of the regulator is heated above the boilinu-point of the liquid, the mercury niveau is regulated bythe elastic force of the vapour of the liquid, and not bythe mere expansion of the liquid it-elr. The mercuryrises and partly or wholly covers the mouth of the narrowtube C D. Should the mouth become entirely closed, asmall jet of gas still remains, the small hole X supplyingthis. It is, therefore, only necessary to put suitableliquids in the end B, and the regulator may be used forall temperatures between — 40J and +360 C. The. slip E on the indiambber tube D, an air-tube F and asiphon G. The long leg of the siphon is placed above 30? THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. [ the Biter to be washed. The washing liquor runs intothe flask from above through the pipe U, the Bow beingregulated by the clip B in such a manner that the f level from a to o takes a little more tune than is required for the washing on the Biterto run through it As soon as the li reached, the air can no longer escape through F; the siphon is thusmade to run until the lev< 1 has sunk to b, when it stopsof itself. The liquor in A then rises again, and the playof the siphon is repeated. If it be desired to wash thelilter with hot liquor, the flask A may be heated in anyconvenient manner.—S. 11. Apparatus for C/ietMcal Laboratories. Dr. T. Walter. J. Prakt (hem. 34, Ism;. 427 condenser recommended by the author is con-structed on a principle thereverscof Liebigs—, whilein the latter the vapou
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
