112 EXPERIMENT STATION EECORD. 



adding a portion of the distillate from the wine, obtained by distilling with 

 phosphoric acid without utilizing a stream of carbon dioxid, to a solution of 

 bisulphite of rosanilin, a violet coloration is obtained. 



The action of minutely distributed metals on olive oil, W. Van Run 

 {Pharm. Wcekhl., -'/J {J908), Xo. 13, iti). 3.',1\ J.}.S; ah>i. iti Ztsriir. Untersuch. 

 Nahr. u. GeiiussmtL, 19 (1910), No. Jf, p. 22^). — Olive oil which had been 

 heated for 6 hours with finely powdered magnesium, aluminum, zinc, man- 

 ganese, iron, nickel, copper. lead, and tin yielded the following results: Mag- 

 nesium, zinc, copper, lead, and manganese were dissolved to a degree in the 

 oiJ and this resulted in a diminution of the acid value of the oil. Aluminum, 

 nickel, and tin had no effect on the oil whatever, and it was impossibe to 

 detect these metals in the ash of the oil. 



The addition of carbonate of potash to cocoa, Bordas (Ann. Falxif.. 3 (1910), 

 No. 16. pp. 61-70). — The legal, physiological, chemical, and industrial aspects 

 of the use of potassium carbonate in cocoa manufacture are discussed. 



Micro-cheniical qualitative and quantitative analysis, F. EmIch and J. 

 DoNAU (Monatsh. Chem., 30 (1909), No. 9, pp. 11,5-151, figs. 3).— This is a de- 

 scription of methods, particularly of the handling and weighing of small pre- 

 cipitates. 



tritrafiltration methods, R. Burian (Zcnthl. Physiol., 23 (1909), No. 22, pp. 

 161-112, flgs. 3). — This contains a very general description of the various forms 

 of apparatus usually employed for ultrafiltration in colloidal chemical work, and 

 a description, with illustrations, of a new filtering apparatus, designed by the 

 author, which can be employed with and without pressure and at diminished 

 pressure. 



The determination of moisture by distillation, S. S. Sadtler (Jour. Indus, 

 and Engin. Chcm., 2 (1910), No. 2, pp. 66, 61). — The results of a distillation 

 method which employs benzene (boiling point 300 to 450° F.) and of the ordinary 

 oven test with cheese, egg albumen, linseed meal, and sawdust, are reported. 



Determination of alkalinity and acidity in soils, K. K. (iEDKOixz (Zhur. 

 Opuitn. Agron. (Russ. Jour. E.rpt. Landw.), 10 (1909), No. 6, pp. 153-181).— 

 This is a critical study of existing methods, with a description of that employed 

 at the Agricultural Chemical Laboratory at St. Petersburg. The determinations 

 made in this scheme of analysis are total alkalinity, alkalinity due to normal 

 carbonates, bicarbonates, and alkali earth metals, total acidity, and the acidity 

 due to free and combined acids. The soil solutions with the above tests are 

 obtained according to the metliods prescribed in Bulletins 18 and 31 of the Bu- 

 reau of Soils of this Department, previously noted (E. S. R., 13^ p. 428; 17, 

 p. 881). 



[Report of the] division of fertilizer chemists, American Chemical 

 Society (Jour. Indus, and Engin. Chem., 2 (1910). No. 2, pp. 10, 11). — A report 

 of the results of cooperative and comparative analyses of fertilizers for nitrogen, 

 l)otash, moisture, etc. 



Potash tests in commercial fertilizers, J. E. Breckenridge (Jour. Indus, 

 and Engin. Chcm., 1 (1909), No. 12, pp. 80^-806).— From the results of repeated 

 tests with the official method for potash the author concludes that the method 

 of adding water and boiling renders some of the water-soluble potash insoluble 

 and" therefore yields low results. In order to overcome this discrepancy, he 

 recommends the following procedure : Take 5 gm. of the substance on a 11 cm. 

 filter, wash with small amounts of cold water into a 500 cc. flask until the fil- 

 trate amounts to about 400 cc, add 5 cc. of hydrochloric acid, bring the mixture 

 to the boiling point, make alkaline with ammonium hydrate, precipitate with 

 ammonium oxalate, filter, and then proceed in the usual manner. 



