The determination of higher alcohols in spirits.—I

rod and disc " apparatus.B y this means we were able to obtain a, product which distilled entirely within half a degree, namely, at 129.5 to 130" C.Apparatus.-Wefound it a matter of very considerable difficulty to obtain an apparatus for the prolonged boiling, in the Allen-Marquardt process, of the carbon tetrachloride solution with the chromic acid mixture which was absolutely air-tight, and would permit of prolonged boiling without loss.Rubber cannot be used, and ordinary corks were found very unsatisfactory.In the same way, neither an ordinary (24-inch) Liebig nor a five-bulb condenser was capable of preventing all loss.Finally we were compelled to resort to an all-glass apparatus, consisting of a 300 C.C. Jena glass Erlenmeyer flask very carefully ground in to a 24-inch Liebig condenser, the central tube of the latter being fitted throughout its length with a Young's '' rod and disc."This effectually prevents the slightest loss, and our experience is that an apparatus of this kind, if properly made, lasts for a very considerable time without cracking, and is useful for many other purposes in the laboratory, notably for the saponification of the ethers in spirits.Otherwise the apparatus used needs no special description.