CHEMISTRY. 867 



belo"W holding 2 cc. The iipi^er bulb is stoppered. In making a test 

 2 cc. of phenolpbthaleiu is placed in the lowest bulb, then 50 cc. of milk, 

 measured on the graduated tube, and 2 to 2.5 cc. one fourth normal 

 soda solution, and mixed, not shaken. Soda is added until alkaline, 

 and the quantity used is read off on the graduated tube connecting the 

 2 large bulbs. 



The relation between specific gravity, fat, and solids-not-fat in 

 milk, H. D. Richmond {Analyst, 20 {1895), Mar., pp. 57, 58). — A sim- 

 plification of Richmond's new formula to 



T = ^ + |f + 0.14, 



in which T=total solids, G=lactometer reading, and F=fat. 



"The results will not differ (in extreme cases) more than 0.02 from 

 the other formula." The formula may be further simplified to 



T = 0.25 G+1.25 F, or T =: ^jt^ 



'^ and this second formula is correct within 0.2 per cent up to 6 per cent 

 fat. It is still more accurate if 0.05 per cent be added for each 1 per 

 cent above 3 per cent, and subtracted for each 1 per cent below 3 per 

 cent." 



The detection of saccharin in beer, F. Gaulter {Eev. Internat. 

 Falsi/., 8 {1894), p. 47; abs. in Chem. Centhl., 1895, 1, ^''o. 3, p. 175).— The 

 author finds that the resin present in beer produces a fluorescence 

 when treated with resorcin and sulphuric acid, and for this reason 

 holds that Bornstein's reaction is uncertain. To obviate this difficulty 

 he evaporates to a sirup, adds a few drops of hydrochloric acid, 

 extracts with 95 per cent alcohol, evaporates the alcoholic extract to a 

 sirup, extracts with ether, and evaporates to dryness. The residue is 

 then extracted with hot water, and the saccharin obtained from the 

 water as a yellowish crystalline substance. — w. d. bigelow. 



Notes on the estimation of iron and alumina in phosphates, K. P. McElrot 

 {Jour. Jmer. Chem. Soc, 17 {1895), No. 4, pp. 260-263). 



Contribution on the estimation of nitric acid, R. Berger {Chem. Ztg., 19 {1895), 

 No. 15, pp. 305, 306). — A volumetric metliod based on the same principle as the Schulze- 

 Tiemann. The method has been successfully used in the analysis of saltpeter, and 

 in the determination of the amount of nitric acid in sulphuric acid. — J. p. street. 



The determination of potash in kainit, R. de Roode {Jour. Amer. Chem. Soc, 17 

 {1895), No. 2, p. 85). — The evaporation of "an aliquot portion of a filtered aqueous 

 solution of kainit directly with platinum chlorid" is claimed to give accurate 

 results. 



The oxidation of organic matter and the decomposition of ammonium salts 

 by aqua regia in lieu of ignition, in the determination of potash in fertilizers, 

 R. DE Roode {Jour. Amer. Chem. Soc, 17 {1895), No. 2, pp. 86, 87).— The details of the 

 method ha^e not yet been worked out. 



On the determination of cane sugar in the presence of commercial glucose, 

 H. A. Weber and W. McPherson {Jour. Amer. Chem. Soc, 17 {1895), No. 4, pp. 312- 

 320k — This article appeared originally in the Proceedings of the Association of 

 Official Agricultural Chemists for 1894. ' 



1 U. S. Dept. Agr., Div. of Chemistry Bui. 43, pp. 126-131. 



