202 EXPERIMENT STATION EECOED. 



with bromin in the presence of calcium carbonate, and as a result calcium 

 viciauobionate was obtained. This on hydrolysis gave calcium gluconate and 

 1-arabinose. Vicianose, therefore, in all probability has the constitution : 



.CH.[CH.OH]2.CH2.0H 



\CH.0.CH2. [CH.0HJ2.CH0 



The glucosid vicianin has the following composition: 



/CH.[CH.0H]2.CHo.0H 



\CH.0.CH2.[CH.0H]3— CH-CH.O.CHPh.CN. 



See also previous notes (E. S. K., 22, p. 702; 24, p. 510). 



A method for estimating lactose, galactose, and g'lucose in a mixture of 

 the three, C. Foa (Arch. Fisiol., 8 {1910), No. 2, pp. 100-110; abs. in Zcntbl. 

 Physiol., 25 {1911), No. 1, p. 11). — The method is a quantitative one, and is 

 based upon the observation made by Glassmann on the reaction between mer- 

 curic cyanid and glucose. 



The determination of starch in wood, A. Manaeesi and JNI. Tonegutti {Staz. 

 Sper. Agr. Ital., J,3 {1910), No. 10, pp. 705-713; ahs. in Chom. Zenthl, 1911, I, 

 No. 5, pp. 332, 333; Chem. Ahs., 5 {1911), No. 16, p. 2663).— Various methods 

 were tried, but the most concordant results were obtained with the autoclave 

 and the Allihn methods. The results obtained with the pressure flask were 

 exceedingly low. 



Methods of analysis and tests of fats and oils suggested by the special 

 committee of committee on the uniformity of analysis of fats and fatty oils 

 {Jour. Indus, and Engin. Chem., 3 {1911), No. 1, pp. 50-52). — This is a de- 

 scription of methods which have been tentatively proposed by the American 

 Chemical Society, including methods for moisture and volatile matter, moisture, 

 suspended impurities, free fatty acids, titer, unsaponifiable matter, and 

 metallic soaps. 



The quantitative estimation of volatile fatty acids in feces, R. S. INIc- 

 Caughey {Ztschr. Physiol. Chem., 72 {1911), No. 1-2, pp. 1J,0-150; abs. in 

 Berlin. Klin. Wchnsehr., 48 {1911), No. 31, p. 1^25). — As the methods usually 

 recommended for determining the volatile fatty acids in feces do not yield 

 reliable results, the author recommends making an alcoholic extract from a 

 definite amount of feces, and distilling off the alcohol from the extract (after 

 adding 10 cc. of phosphoric acid, 1.12 specific gravity), in a vacuum and with 

 steam. 



With this method, according to the author, accurate results can be obtained 

 within 2 hours. 



The quantitative determination of tannin with casein, M. Nierenstein 

 {Chem. Ztg., 35 {1911), No. //, p. 31). — About 800 analyses were made with the 

 method, the results being from 1 to IJ per cent higher than those obtained with 

 the hide powder method. The method is not satisfactory for tanning extracts, 

 although applicable to the examination of fruits and bark. The author points 

 out its value for the dyeing and textile industries. 



Is peroxidase a ferment? Hesse and W. D. Kooper {Ztschr. Untersuch. Nahr. 

 u. Genussmtl., 21 {1911), No. 7, pp. 385-393; abs. in Ztschr. Angeic. Chem., 2// 

 {1911), No. 23, p. 1096). — The results of this investigation point to the possi- 

 bility that peroxidase is not an enzym, and that the reaction usually obtained 

 with Rothenfusser's reagent (E. S. R., 20, p. 1107) is due to an alkaline milk 

 constituent. The possibility of more than one alkaline substance taking part 

 in the reaction is also mentioned. 



