AGRICULTURAL CHEMISTRY. 113 



Official analysis of Russian high-grade sugars {Sugar Beet, 29 (1908), 

 Xo. 'i. pp. ,320, 321). — Changes in the method of analysis of standard white 

 sugars udoi)ted by the Imperial Technical Committee in Russia are summarized. 



Concerning the Marpmann reaction for distinguishing between sepa- 

 rator honey and honey obtained by heating the comb, Utz {Ztsclir. Offeiitl. 

 Chan., l.'f (J90S), Xo. 2, pp. 21-28). — The reaction under consideration depends 

 upon the detection of the ferment present in raw honey which is destroyed when 

 it is heated over 50°. Hydrogen peroxid .is used as a reagent and p-pheuylen- 

 diamin or other material as an indicator. Methods of manipulation and related 

 topics are discussed and the results of an examination of a large number of 

 samples of Cermau and foreign honeys are reported. 



The detection of cherry juice in raspberry juice, Jonscher {Ztschr. Offentl. 

 CJicni., l.'f {1!)0S), Xn. 2, pp. 29, 30). — The author criticises the lead-acetate 

 method for the detection of cherry juice, particularly in the case of raspberry 

 juice which has undergone fermentation, and states that he proposes to study 

 this question. 



Examination of white wine colored with parched chicory, Popescu (Ann. 

 Chim. Aiiali/t., 13 {1908), Xo. 3, p. 101). — According to the author's investiga- 

 tions, parched chicory coloring matter is insoluble in ether but is extracted by 

 amyl alcohol, which is not the case with the coloring matter of the untreated 

 white wine. Fresh albumin completely precipitates the natural coloring matter 

 of wine, the filtrate being uncolored with natural wine and yellow if chicory 

 has been used. Other characteristic differences are also pointed out. 



Ester estimation in wine, G. Austerweil and P. Pacottet {Chem. Ztg., 32 

 I 1908), Xo. 10, pp. 112, 113, fig. 1). — Apparatus is described which, according 

 to the author, facilitates the detennination of esters in wines. 



Lactic acid in wine, G. Paris {Staz. 8per. Agr. Ital, J/O {1907), No. 8-12, pp. 

 689-720, figs. 3). — A comparison of the author's method with other methods for 

 estimating lactic acid in wine. 



The precipitation method for the estimation of oils in flavoring extracts 

 and pharm.aceutica,l preparations, C. D. Howard {Jour. Amer. Chem. Soc, 30 

 (1908), Xo. '/. pp. 608-611). — The precipitation method, according to the author, 

 affords a direct and valuable check on polarimetric results in addition to pro- 

 viding the material for a refractometric examination. The results which he 

 presents were obtained with solutions of different strength and also with com- 

 mercial extracts. 



The quantitative estimation of total sulphur in urine, H. Schulz {ArcJi. 

 Physio}. [Pfliigcr], 121 {1907), Xo. 1-2, pp. ll-'t-l 16). —In the method described 

 organic matter in the urine is destroyed with fuming nitric acid and the sulphur 

 eventually precipitated as barium sulphate. As shown by duplicate tests, the 

 method gives satisfactory results. 



The methods of analysis of raw rubber, D. Spence {Liverpool Univ., Inst. 

 Com. Research Trop. Quart. Jour., 2 {1907), No. 5, pp. 91-104). — ^The author 

 discusses the need of a uniform method of analysis of rubber, and describes a 

 method which in his experience has proved satisfactory. 



Miscellaneous analysis, B. L. Hartwell {Rhode Island 8ta. Rpt. 1907, pp. 

 29'j-298). — ;\Iore or less complete analytical data are given regarding various 

 fertilizer substances, poultry grit, malt sprouts, aiid materials used in a poultry 

 feeding experiment, and the moisture, nitrogen, phosphoric acid, and potassium 

 ox id content of several samples of hay. 



Modification of the Soxhlet extractor, H. C. Wood, Jr. {Amer. Jour. Pharm., 

 80 (1908). Xo. 3, p. 106, fig. /).— The modified form of the Soxhlet extractor, 

 which, according to the author, is simple and inexpensive, consists of a narrow 

 percolator, the lower end of which is connected by means of .a tightly fitting 



