American Chemical Journal, Volume 24

Front Cover
Ira Remsen, Charles August Rouillu
s.n., 1900 - Chemistry
 

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Page 273 - Heat in a beaker about 300 cc of hydrochloric acid (sp. gr., 1.06) and 11 gins, of phloroglucin, added in small quantities at a time, stirring constantly until it has almost entirely dissolved. Some impurities may resist solution, but it is unnecessary to dissolve them. Pour the hot solution into a sufficient quantity of the same hydrochloric acid (cold) to make the volume 1500 cc...
Page 381 - ... to each member of the International Committee a circular letter containing three questions, which were speedily answered by nearly all of the delegates. A literal translation of these questions follows : — "1. Shall O = 16 be fixed as the future standard for the calculation of atomic weights ? " 2. Shall the atomic weights be given with so many decimals that the last figure is certain within half a unit, or what other procedure shall be adopted ? " 3. Is it desirable that a smaller committee...
Page 524 - It is not the purpose of this paper to discuss the various theories which have been put forward from time to time to account for the...
Page 273 - Allow it to stand at least overnight — better several days — to allow the diresorcol to crystallize out, and filter immediately before using. The solution may turn yellow, but this does not interfere with its usefulness. In using it, add the volume containing the required amount to the distillate.
Page 453 - ... then sway the tube slowly from side to side in such a manner as to produce a gentle rotary motion of the two layers. Persist in this operation, if necessary, for a minute or more, using a piece of white paper for a background, and producing only a very gradual and partial mixing of the acid and water. Nearly half of the acid should remain as a distinct unmixed layer at the end. When methyl alcohol is present, the shaking causes the separation of more or less voluminous flocks of a very characteristic...
Page 517 - The anthropologist will be disappointed that, in spite of the vast amount of work which has been done, the majority of problems of particular interest to him still await solution.
Page 388 - ... result of some observations made while studying the mechanism of organic reactions, that are induced by aluminium halides. The aim was the determination of the molecular weight of aluminium halides, as well as that of their addition and reaction-products, as nearly as possible under the same conditions as those under which they are used and formed in organic reactions ; namely, dissolved in some lowboiling, indifferent medium. The substances studied were : I. Organic compounds like aluminium...
Page 270 - The flask is then filled to the mark with water and after mixing thoroughly, a 17.6 c\ c. pipette full is measured into a Babcock test bottle. About three cc of the sulfuric acid commonly used for testing milk are then added and the milk and acid mixed by shaking the bottle vigorously. The milk is curdled by the acid, and the curd and whey separated somewhat. In order to make this...
Page 525 - According to this view, therefore, no fat ever enters or leaves the epithelial cells as such, but as fatty acid and glycerin. These two substances then enter the central lacteal, where equilibrium is again established and there is a large production of fat.
Page 30 - A curve constructed from the increase of weight of the ammonic iodide showed that there was a marked diminution in the speed of the absorption after the first atom of bromine had been added. This decrease in the speed of absorption is undoubtedly connected with the conversion...

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