Chemical News and Journal of Industrial Science, Volume 79 (Google eBook)

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Chemical news office., 1899 - Chemistry
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Page 147 - The troubles arise from the conduction of heat by the leads ; the small latent heat of hydrogen volume for volume as compared with liquid air ; the inefficiency of heat isolation and the strain on the thermometer brought about by solid air freezing on it and distorting the coil of wire. In many experiments the result has been that all the liquid hydrogen has evaporated before the pressure was reduced to 25 mm., or the thermometer was left imperfectly covered. The apparatus employed will be understood...
Page 98 - ... dissolved in water, to which a few drops of nitric acid have been added will be found most convenient.
Page 156 - ... necessary to know the exact amount of the impurity, and this was suitably determined. It is satisfactory to know the cause of the discrepancy, however, as well as to know that it is easier to prepare carbon monoxide almost free from hydrogen than seriously contaminated with it. More often than we suspect, perhaps, are our carelessly planned efforts at purification apt thus to introduce more impurity than they eliminate. In a recent number of the Journal of the American Chemical Society, (March,...

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