\<;i;k ii.i 11; \i. I n EMISTRY. 833 



"In view of the wide differences in the constitution «»f the proteins <»i' the 



differenl species of seeds. ;is shewn hv (lie determinations of gl 111 :i in i II ie acid 



given in this paper, .-is well as hy the few quantitative determinations of the 

 other decomposition products which have been made, it would seem important to 

 know definitely whether or nol similar differences exisl between the proteins 

 of the tissues of differenl species of animals which serve as lend for man. for 

 ii is possible that in such differences will be found u logical basis for the use of 

 one form of protein rather than another when dealing with nutrition in various 

 pathological conditions." 



The authors propose to continue their investigations. 



Concerning the detection of boric acid, G. 1 i:\iu. 1.1: (Ztschr. Untersuch. 

 Nahr.' u. Genussmtl., II (1906), No. 3, \>\>. 131 l'i)\. A method of estimating 

 boric acid is described which depends upon comparing the intensity of the cur 

 cuma paper reaction with a color scale mad.' by immersing strips of curcuma 

 paper for different lengths of time in differenl solutions of boric acid of known 

 strength. 



The sensitiveness of curcuma paper for boric acid reaction, L. Wolfbi \i 

 and J. Pinnow (Ztschr. I ntersuch. Nahr. u. Genussmtl., ll (1906), Vo. 3, pp. 

 I j / 154). -Differenl sorts of commercial curcuma paper we*e compared. 



The estimation of sulphurous acid in certain foods and also the estima- 

 tion of sulphur in illuminating gas, T. Schumacher and E. Fedeb (Ztschr. 

 I ntersuch. Nahr. u. Genussmtl., 10 (1905), No. //. pp. 649-659, fig. I). — The 

 method described depends upon the distillation of an acidulated portion of the 

 substance to be examined with a solution of iodate of potassium. 



The detection of talc and coloring matter in grits and rice, E. VON Km mi v. 

 (Ztschr. I ntersuch. Nahr. u. Genussmtl., 10(1905), No. II. i>i>. 7//-7/'/i. 

 It has been found that coloring matters and talc are easily separated with 

 chloroform. The author describes a method of estimating talc which depends 

 upon shaking the sample with chloroform and evaporating to dryness. 



The occurrence of cholesterin and lecithin in milk and their importance 

 in the determination of fat by the Gottlieb method, M. Siegfeld {Milchw. 

 /.mil, l.. 2 (1906), No. I. pp. /-•>). — Fat determinations by the Gottlieb method 

 were found to be 0.0243 per cent too high, due to the presence of 0.0041 percent 

 of ether-insoluble material. 0.0036 per cent of unsaponifiable material, and 

 0.0166 per cent of lecithin in the solids obtained by this method. 



On the accuracy of the Wollny refractometer, the Gottlieb method, and 

 the Gerber acid butyrometer for the determination of fat, II, SCHBOTT- 

 Fiechtl ( Milchw. ZentbL, 2 (1906), Vo. I, pp. tS t9). — The Gottlieb-Rose method 

 is considered the most accurate gravimetric method for the determination of fat 

 iii milk. The average of Km determinations hy this method was 2.2849 per 

 Cen1 and hy the refractometer method 2.2755 per cent. A similar comparison 

 of the Gerber and Wollny methods gave average results of ."'..Tl'oLI and 3.7210 



per cent, respectively. 



New nonacid method for the rapid determination of fat in milk. X. Gerbeb 

 iMilch Ztg., .1', i 1906 i . \". /. ///-. .>'7. 38). Comparative tosts of the Sichler and 

 Gerber methods are reported and the conclusion is drawn that there Is no 

 reason for abandoning the Gerber method in favor of the aonacid method. 



Formalin as a means of preventing plugging in the determination of fat 

 in the Gerber butyrometer, < '. Beoeb, ( Milchw. Zentbl., 2 (/.'""<'). No. l. />/>. 

 6-8). — This trouble, according to the author, may he avoided hy the addition of 

 1 drop of formalin per cubic centimeter of amy! alcohol and the accuracy of 

 the test not interfered with. 



