616 EXPERIMENT STATION RECOKD. [Vol.38 



The authors conclude that for rapidity and accuracy the Franz-Adler method 

 is the best, although it can not be used to detect peanut oil in lard and cotton- 

 seed oil. The solidification method is not sensitive enough, as but little difCer- 

 ence is shown with large variations in peanut-oil content. In the Renard- 

 Archbutt method 10 per cent of peanut oil can barely be detected. 



A study of the solubilities of liquids in liquids. The partition of the 

 lower alcohols between water and cottonseed oil, B. B. Weoth {[Gettysburg, 

 Pa.]: Author, 1917, pp. 21, fig. 1). — "The partition ratios of methyl, ethyl, 

 propyl, isobutyl, and isoamyl alcohols between water and cottonseed oil at 

 25° C. are found to be 103.6, 28.3, 6.41, 1.7, and 0.47, respectively. These are 

 found to change regularly with increased number of carbon atoms. The 

 solubilities of methyl and ethyl alcohols in cottonseed oil are 4.84 and 21.2 

 gm. per 100 cc. of oil." 



A special nomon for calculating the purity of sugar solutions, A. F. 

 Blake (Internat. Sugar Jour., 20 (1918), No. 230, pp. 73-78, figs. 2).— The 

 author has constructed a special form of the nomon, previously noted (E. S. R., 

 88, p. 204), for the rapid determination of the "exponent" of sugar solutions. 

 This exponent is the sucrose percentage of the solid matter and is determined 

 by the following equation : 



26 

 Exponent=polanzationX specific gravity XBT-IZ 



In the special form of nomon a scale has been constructed with the degrees 

 Brix indicated at the point corresponding to the respective values of the factor 



--. =— ^ — All data on the regular chart which are not required have 



specific gravity XBnx. 



been eliminated. 



It is the author's intention to work out other applications of the nomon to 

 the numerous calculations of the sugar industry. 



Determination of water in sugar factory products by means of the distil- 

 lation method, T. van dek Linden, M. Kauffman, and F. Leistra (Arch. 

 Suikerindus. Nederland. Indiii, 25 (1911), No. 22, pp. 951-962, fig. 1; Medcd. 

 Proefstat. Java-Suikcrindus., Chem. Ser. No. S (1917), pp. 12, fig. 1; ais. in 

 Internat. Sugar Jour., 20 (1918), No. 230, pp. 89, 90).— The method described 

 consists of distilling 50 gm. of the sample with 350 cc. of xylol. The water is 

 carried over with the distillate and is measured directly in a 250-cc. measuring 

 cylinder graduated to twentieths of a cubic centimeter. The distillation is so 

 regulated that about 100 cc. pass over in three quarters of an hour and 100 cc. 

 more in the next quarter hour, at the end of which time the distillation is 

 stopped. A meniscus correction for xylol and an apparatus correction for the 

 small loss of water have to be made. 



The method is considered satisfactory, but requires very careful attention. 



Solubility of calcium sulphite in water and in sugar solutions, T. van der 

 Linden (Rev. in Internat. Sugar Jour., 20 (1918), No. 230, p. 91). — Previously 

 noted from another source (E. S. R., 36, p. 716). 



Preservation of Virginia fruits and vegetables, Edith A. Roberts (Va. 

 Polytech. Inst. Ext. Bui. 17 (1917), pp. Jf8, figs. 4).— In this bulletin, issued in 

 cooperation with the U. S. Department of Agriculture, the author has compiled 

 from various sources extensive material on the different methods of the pres- 

 ervation of fruits and vegetables. A number of recipes and charts for the 

 cold-pack process and for making preserves and catsups, as well as suggestions 

 for the arrangement and equipment for canning by the cold-pack method, are 

 included. 



