Journal . millimetres above the level of the mercurv, so that an increase of temperature and of vapour prrssure eau at oncebe signalled. The test-vessel F (Fig. 3; serves to deter-mine the specific gravity of the distillate and to charge thereceivers, the apparatus (Fig. 4) serving to signal when thereceiver is full, consists of a glass tube a opened at thelower end and at the side. In a is a small float c. A plateof wood or ebonite, fastened by two bolts, bears a copperrod /; on to which a second piece g is fastened by means ofthe screw A. If the receiving flask is full the float comesin cont
Journal . millimetres above the level of the mercurv, so that an increase of temperature and of vapour prrssure eau at oncebe signalled. The test-vessel F (Fig. 3; serves to deter-mine the specific gravity of the distillate and to charge thereceivers, the apparatus (Fig. 4) serving to signal when thereceiver is full, consists of a glass tube a opened at thelower end and at the side. In a is a small float c. A plateof wood or ebonite, fastened by two bolts, bears a copperrod /; on to which a second piece g is fastened by means ofthe screw A. If the receiving flask is full the float comesin contact with the small platinum plates / and m, wherebythe circuit is closed and the electric bell rung. It is necessary, for the apparatus to work well, that thedistillation should be commenced slowly, and the gasflame gradually raised. A mixtnre of alcohol and watercan be distilled at the rate of 4—5 litres per hour, while a 234 THE ^ OF THE SOCIETY OF CHEJUCAL INDUSTRY. [March si. 1888. Fitf. 2, *. mixture of Inityl aud amyl alcohols can beilistilled at. doublethe rate. The appuratus also serves for the distillationof crude petroleum, benzene, and aniline. Tts efficacy isequal to that of Lc Bel Hciininger column with 15 bulbs ;it is constructed by Wiesnegg, of Paris.—V. H. V. PATENT. Improvements in Apparatus for use in estimathii/, measuringand comparintj Colour^ Texture, and Appearance ofLiquid or Solid Bodies, Materials, or Fabrics, viewed bytransmitted or rijlvcted Liyht. J. W. Loviboud, Iat. 3859, March 14, 18S7. Srf. The apparatus described is an improvement on Eng. ,867 of 1886 (this Journal 1887, 522). Instead of, or inaddition to, the coloured glasses described in that specifica-tion, the patentee employs a glass vessel having its front andrear walls, which are of clear glass, inclined towards eachother so as to fonn a vessel of rectangular cross section and ofwedge-like form, the height of the vessel being about12 inches, the width at th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
