708 EXPERIMENT STATION EECORD. 



27 (J'JOS), No. 21, p. 1078). — The author proposes u rapid method of estimating 

 succinic acid by precipitation with bromid of barium after the other substances 

 have been removed by various reagents. 



Physicochemical analysis of wine, P. Dutoit and M. Duboux (Ann. Vhim. 

 Analyt., 13 {1908), Nos. 11, pp. J,17-Ji27, figs. 5; 12, pp. 461-'J,68, figs. .',; Compt. 

 Rend. Acad. Sci. [Paris], l.',7 (1908), Xo. 2, pp. 13',-137; ahs. in Jour. Hoc. Chcm.'' 

 Indus., 27 (IQOS), No. 16, p. 871). — By adding a solution of barium hydroxid 

 in small portions to wine, and determining the electrical conductivity after each 

 addition, it is possible to estimate consecutively the sulphates, total acidity, 

 and tannin substances. 



The estimation of volatile bases in wine, P. Dutoit and M. Duboux ( t^chwciz. 

 Wchnschi: Chem. u. Pharm., 46 (1908), No. .'/}, pp. 703-706, fig. 1).—The results 

 of gravimetric and volumetric estimation of ammonia in wine do not agree, the 

 discrepancies being ascribed to the presence of organic bases. The authors 

 have continued the physicochemical methods noted above for the estimation of 

 ammonia and organic volatile bases. 



Notes on essential oils, F. Watts and H. A, Tempany (West Indian Bid., 9 

 (1908), No. 3, pp. 265-277, dgms. 2). — In this article are described the character- 

 istics of oils obtained from lemon grass, bay leaves, and camphor, with remarks 

 on their distillation. A simple form of still is described and illustrated. 

 Chemical analyses are given. 



Oil of orange, E. Dowzard (Anicr. .lour. Pharm., 80 (1908), No. 10, pp. .'/7J- 

 .^76'). — The specific gravity and other constants were determined in IT samples 

 of normal and adulterated sweet orange oil. 



" It is customary to report the rotation of orange oil at 20° C. It is not, how- 

 ever, necessary to determine the rotation at this temperature, as by using the 

 above corrections the constant may be determined at any temperature between 

 10° and 30° C. 



"Owing to the high rotatory power of orange oil, sojihistications such as 

 turpentine and lemon oil are easily detected. In doubtful cases the oil should 

 be distilled and the rotation of the first 10 per cent of the distillate determined. 

 The rotation should be not at all or only slightly lower than that of the original 

 oil. . . . 



" The common adulterants of orange oil are turpentine, lemon oil, terpenes 

 of lemon and orange oils, and alcohol. All lower the rotation except orange oil 

 terpenes. Alcohol may be detected by shaking a known volume of the sample 

 with water. The alcohol is removed by the water, which of course is increased 

 in volume. Resin has been used as an adulterant and may be detected by a 

 residue determination. The residue on evaporation of pure oil is from 2 to 4 i>er 

 cent." 



Per cent tables for oil in cotton-seed products, C. H. Herty (Chapel Hill, 

 N. C, 1908, pp. 50). — A raind and simple method for obtaining the oil content 

 is described. It is stated that by its use and that of. the tables prepared the oil 

 content of cotton seed can be estimated in 30 minutes. 



Carrotene from carrots and the substances which accompany it, H. Euleb 

 and E. Nordenson (Ztschr. Physiol. Chem., 56 (1908), pp. 223-235; abs. in Jour. 

 Chem. 8oc. [London], 9Jt (1908), No. 550, II, p. 72^).— From 23 kg. carrots 0.7 

 gm. carrotene and xanthophyll were separated, as well as 13 gm. phosphatids, 

 lecithin, etc., and 3.5 gm. of an unknown oil, 0.5 gm. daucosterol, and 1.3 gm. 

 phylosterol, 



A note on the analysis of cutch and the preparation of pure catechin, P. 

 Singh (Indian Forest Mem., 1 (1908), No. 1, Chem. Ser., pp. 20, pis. 6). — Con- 

 sideration is given to the chemistry of cutch and catechin with special reference 

 to the methods of extracting catechin from cutch. The methods of analysis are 



