. Journal. orrection,and the author considers that the results cannot beregarded of value as even approximate apparatus shown in the figure, however, is recom-mended as giving results closer to the truth, since itallows the oil to be cooled much more slowly. The vesselA is filled with the mixture of ice and salt, whilst none isplaced in the inner chamber B, and the observation slitC. The test-tube, n (diameter 20 mm.) is filled withthe oil to a depth of 30 mm. and closed by the india-rubber cork, s, through which is passed the thermometer, IThe tube is then placed in a large
. Journal. orrection,and the author considers that the results cannot beregarded of value as even approximate apparatus shown in the figure, however, is recom-mended as giving results closer to the truth, since itallows the oil to be cooled much more slowly. The vesselA is filled with the mixture of ice and salt, whilst none isplaced in the inner chamber B, and the observation slitC. The test-tube, n (diameter 20 mm.) is filled withthe oil to a depth of 30 mm. and closed by the india-rubber cork, s, through which is passed the thermometer, IThe tube is then placed in a larger tube, in (diameter 30mm.), and kept in position by means of the cork ring, v,so that it is surrounded by a layer of air of about 4 tube m is then lowered into the vessel. B, and clampedin position. The behaviour of the oil can be observedthrough the slit, C, and the tubes can be raised andshaken without coming in contact with the hand. thus obtained with three different oils differed by. at most —1-5° C. from those given by the met! 3immersion in the different salt solutions, whieitaken as standards of comparison.—C. A. M. Maltose in Presence of Dextrose J Detection and Dele i« Hon of Small Quantities of . J. L. Baktaii W. D. Dick. Analyst. 1905, 30, 79—83. The authors have critically examined the methojpposed by Grimbert (this J., 1903, 382) for the delBof maltose in presence of dextrose, based on the dillsolubilities of their osazones in acetone. They fountfebenzene is not a suitable solvent for removing tin irby-products of the osazone reaction, sinmaltosazone. The mixed osazones, however, m •purified by treatment with a little cold 5 pi :acetone; when the mixture is subsequentin a Gooch crucible with 10—15 of cold 20 pel HIacetone, the filtrate deposits crystals of nialto «?mixed with a little dextrosazone. In this mam Ipresence of maltose can be detected with ceritprovided the proportion of this sugar is not 1*115 per cent, in the mix
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
