308 EXPERIMENT STATION RECORD. 



A new method of ash determination, A. E. SniTTLKwoiixii (Onlarlo Agr. Col. 

 and Expt. Farm lipt. 1899, pp. 42-44, .fi<J^- 4)- — This relates to the use of acetate of 

 lime to prevent the formation of indecomposable silicates, and the author's platinum 

 apparatus (E. S. R., 11, p. 304). 



Contribution to the knowledge of raetaphosphate, (i. von Kxorre {Zhclir. 

 Anorgan. Chem., 24 {1900), p. 369; abs. in Chem. Ztg., 24 {1900), No. 66, Reperl., p. 

 233). — The author concludes from his investigations that all of the five known mod- 

 ifications of metaphosphate may he represented by the formulas (R'POs)^ and 

 (E"P.,Og)n, all combinations containing 1 molecule each of base and phosjjhoric; 

 anhydrid. 



A process for preventing the reversion of soluble phosphoric acid in super- 

 phosphates dried by heat by means of compressed air or a current of air 

 {L'Engraw, 15 (1900), No. 30, p. 712). — A brief note is given on a process patented 

 by J. Liijens. 



Determination of nitrous acid, G. Romijn {Cliein. Ztg., 34 {1900), No. 15, pp. 

 145, 146). 



Critical studies on the more important reagents for the detection of nitric 

 acid in water, H. ]\Iexnicke {Ztadir. Angeu: Chem., 1900, No. 29, pp. 711-719; abs. 

 in Chem. Centbl., 1900, II, No. 7, j). 444)- — After testing numerous methods the author 

 gives preference to Erdmann's method (E. S. R., 12, p. 18). 



On the determination of perchlorate in nitrate of soda, C. Ahrexs and 

 P. Hett {Ztschr. Angeu: Chem., 1900, No. 17, p. 419). — A denial of Woy's statement' 

 that platinum dishes are injured by use in the determination of perchlorates by the 

 author's method (E. S. R., 11, p. 110). 



The determination of iodic acid in nitrate of soda, M. R. Auzenat {Rev. Chim. 

 Anulyt. et Appl., 5 {1900), No. 3, pp. 84, <5'5).— The limited application of Beckurts' 

 and Rammelsberg's methods is noted. By a slight modification of the latter method 

 the disturbing influence of potassium perchlorate is avoided. The method consists of 

 comparing the color produced by the liberation of the iodin with that produced by 

 a solution containing a known amount of potassium iodid. Complete directions are 

 given as to manipulation. — n. sxvdee. 



The estimation of chlorin in bleaching powder, C. Wolowski {Zl.%-hr. Anabjl. 

 Chem., .18 {1890), No. 11, pp. 711-713). 



The titration of normal acids, H. TniELEand R. Riciitek {Ztscjir. Angew. Chem., 

 1900, No. 20, pp. 486-489). 



On the use of succinic acid in alkalimetry, E. Petersen (Ztec/u-. Angeir. Chem., 

 1900, No. 28, p. 688). 



The elementary analysis of organic substances containing water, F. G. 

 Benedict {Amer. Chem. Jour., 23 {1900), No. 4, pp- 334-352). 



Chemical studies on the extraction of fatty substances by means of carbon 

 bisulphid, L. F.\bre {OeMerr. Chem. Zlg., 3 {1900), No. 15, pp. 370, 371). 



An examination of Brown and Taylor's oflBlcial method of identifying but- 

 ter, J. A. Hi-MMEL {Jour. Amer. Chem. Soc, 22 {1900), No. 6, pp. 327-329, ph. 2).— 

 The author has successfully employed this method in testing for rencjvated butter. 

 "In every case the normal ])utters gave with the selenite which was used a unifonnly 

 blue-colored field, showing the entire absence of fat crystals. The renovated butters 

 on the other hand gave a blue field mottled with yellow; this mottled appearance 

 varied slightly in intensity, but was very marked and distinctive in every case." 



The chemistry of corn oil, H. T. Vui.te and H. W. Gibson {.Tour. Amer. Chem. 

 Soc, 22 {1900), No.8, pp. 453-467).— Thu chemical and physical t-onstants were 

 determined for 8 samples of corn oil. 



On the rancidity of fats, I. Nagel {Amer. Chem. Jour., 23 {1900), No. 2, pp. 173- 

 176). — The rancidity of fat*i and the refining of rancid oils and fats. 



1 Ztschr. Angew. Chem., 1900, ^■o. 15, j). 382. 



