CHEMISTRY. 337 



{1903) , Xo. 4^sv, //, p. 478). — The solubilities obtained in solutions of different con- 

 centrations ajiree with those reported by Cameron (E. S. R., 13, p. 927). 



On the protamins and the constitution of albuminoid substances, A. Kossel 

 {Bui Sac. Chilli. Parl.'<, .1. ser., 29 (190.)'), Xa. 14, pp. I-XVIII) . 



A new method of determining sulphuric acid, F. Raschig {Zt.srlir. Auijcn: 

 Cheiii., 16 {1903), Xi>. 26, pp. 617-619). — A discussion of some of the difficulties 

 encountered in using the method proposed by Muller (E. B. R., 15, p. 121). 



Titration of sulphuric acid with benzidine chlorhydrate, W. J. Muller 

 (Ztsclir. Aiignc. Clieiii., 16 {1903), Xo.27, pp. 6.'>.]-6.53). — A reply to the above article. 



Determination of sulphuric acid by means of benzidine, F. Raschig {ZtscJir. 

 Angcir. Cliciii., 16 {1903), Xo. 34, pp. S'1S-S23). — Further comments on Miiller's 

 method. 



The estimation of sulphur in urine by means of sodium peroxid, G. iNIodka- 

 KOWSKi {Zt.schr. I'liyxioL ('hem., 38 {1903), Xo. 5-6, pp. .562-566). 



Hoppe-Seyler's handbook of physiological and pathological-chemical 

 analysis, TuiEUFELDEit {Iloppe-Scijki'.^ IIiiiiilhnc]i der jihijsiobxjhch- imd palJuiloyixcJi- 

 chemisdien Analyse. Berlin: Hirschwald, 1903, 7. cd., pp. 618; rev. in Hijy. Rundsclnui, 

 13 {1903), Xo. 5, pp. 227, 228) .—A revised edition of this valua]:>le text-book. The 

 attempt has been made to include the material which has accumulated since the 

 previous edition. 



The examination of meat, yeast, and other extracts for xanthin bodies. 

 I. The xanthin bodies of meat extracts, K. Micko {Ztschr. Untersuch. Xaltr. u. 

 Genussmtl., 6 {1903), Xo. 17, ^yp. 7<9i-7.9i).— Analytical methods are described. 



The electrolytic estimation of minute quantities of arsenic, more espe- 

 cially in brewing materials, T. E. Thorpe (.Tour. Chein. Soe. [London], S3 {1903), 

 Xo. 489, pp. 974-986, fg.^ 2) . 



Determination of vanillin in vanilla, A. Moulin {Bui. Soc. Chim. Paris, 3. ser., 

 29 {1903), Xo. 7, pp. ^78-280).— The decolorized ether extract is treated with a 

 mixture of sulphuric and acetic acids and crystals of potassium nitrate are added. 

 The formation of methyl picrate from the vanillin gives the solution a yellowish 

 color, which is compared with a scale prepared with known amounts of vanillin. 



The detection and estimation of mineral acid in acetic acid and vinegar, P. 

 ScHiDROwiTZ {Analyst, 28 {1903), Xo. 329, pp 233-237). 



A new method for the determination of halogen compounds in organic 

 substances, H. Daubigny and G. Chavanne {Bui Soc. Chini. Paris, 3. ser., 29 

 {1903), Xo. 15, pp. 807-810). 



The use of normal sodium oxalate in quantitative analysis, S. P. L. Soren- 

 SEN {Ztschr. Anahjt. Chem., 42 {1903), Xo. 6-7, pp. 333-359, fig. 1). — The author con- 

 cludes from the results of experiments which are reported that sodium oxalate when 

 carefully prepared and dried at 230° C. can be used in the titration of acids without 

 noticeable error, even in work requiring very ai-curate determinations. 



The testing of sodium oxalate and its use in volumetric analysis, S. P. L. 

 SoRENSEN {Ztschr. Analyt. ('hem., 42 1 1903) , Xo. 8, pp. 512-516). — ^Methods for deter- 

 mining the presence of water, sodium car))onate, and inorganic and organic impuri- 

 ties in sodium oxalate are given, with brief directions for the use of this material in 

 volumetric analysis. 



The absorption of nontanning substances by hide powder and its influence 

 on the estimation of tannin, H. R. Procter and F. A. Blockey {Jour. Soc. Chem. 

 Ind., 22 {1903), Xo. 8, pp. 482-484) ■ 



Select methods of chemical analysis, A. Classen and H. Cloeren {Ausgewdhlte 

 Metlioden der analytischen Cheniie. Brunswick: Friedric.h Vieweg »(,- /S'r>//, 1903, vol. 2, 

 pp. XVI~\- 831, pis. 3, figs. 133). — This is the second volume of this work, previously 

 referre<l to (H 8. R., 13, p. 421). Special methods are given for oxygen, o/one, 

 hydrogen, hydrogen peroxid, sulphur, chlorin, bromin, iodin, fluorin, nitrogen, 



