Journal . boredcaoutchouc stopper with an inverted condenser and a tubefor passing hydrogen. This tube is drawn to a jet andpasses to the bottom of the flask. The upper part of theeonden-er tube is bent downwards and is connected with aU tube filled with glass beads and strong sulphuric is connected with a Geisslers potash bulbs and acalcium chloride check tube. The fermenting flask is keptat 34° C. by means of a water-bath and Soxhlet regulator. m. T^i The fermentation goes on in a stream of hydrogen. After20 hours (40 hours in case of cane sugar) the hydrogen isturned oft and the l
Journal . boredcaoutchouc stopper with an inverted condenser and a tubefor passing hydrogen. This tube is drawn to a jet andpasses to the bottom of the flask. The upper part of theeonden-er tube is bent downwards and is connected with aU tube filled with glass beads and strong sulphuric is connected with a Geisslers potash bulbs and acalcium chloride check tube. The fermenting flask is keptat 34° C. by means of a water-bath and Soxhlet regulator. m. T^i The fermentation goes on in a stream of hydrogen. After20 hours (40 hours in case of cane sugar) the hydrogen isturned oft and the liquid in the flask boiled for about 5minutes, and then a current of air passed for about 20minutes.—H. T. V. Isodtdcite. Emil Fischer and J. Tafel. Ber. 21,-173. On boiling isoduleitecarbonic acid with hydriodic acid, afatty acid is produced as well as a lactone. The former isidentical with normal heptylic acid. It follows thatisodulcite contains a normal carbon chain and an aldehydegroup, and is therefore an homologue of arabinose. Theformula is either— CH3.(CHOH.)4COH, or CH„,,.(CH0H)3C0H. Isodulcite resembles dextrose and galactose as regardsthe difliculty with which it is attiicked by nascent hydrogen,in distinction to and numnose, both of whichcontain ketone, but no aldehyde groujis. and are readilyacted upon by nascent hydrogen. An improved method forthe production of isoduleitecarbonic acid is also given. —A. K. followin
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
