CHEMISTRY. 225 



solids. The latter is found to be practically constant, varying' slightly 

 for different breeds of cows. From the analysis of 20 samples of cream 

 the author found this factor to be 8.7. 



The above formula is easily understood when it is remembered that 

 the fat-free solids in ordinary milk and cream decrease in the same 

 ratio that the fat increases. — j. t. Anderson. 



The constitution of tannic acid, H. Sciiifi" (Gaz. chim. Hal.. .:', (1897), No. 1, p. 

 90; ahs. in Chem. Centbl., 1897, I, No. 8, p. 411). 



Contributions to the birotation of dextrose, H. Trey (Ztschr. physikal. Chem 

 (1S97), Xo. 3, p. 434). 



Remarks on the structure of formose, < >. Loew (Chem. Ztg., 21 (1891 , No. 26, p. 

 242). — The author attempted to decide whether the condensation product of formic 

 aldehyde, formose, contains a normal chain. Hexite was formed by reduction witb 

 sodium amalgam and converted into the benzal compound. Xone of the tribenzal 

 derivatives described by Fischer were produced, so that no normal chain can be pres- 

 ent. The author gives the formula 



CH, OH 



>C(OH). CHOH. CO. CH ; OH. 



CH; OH 



based on previous investigations. — w. ii. kri g 



The copper reducing power and the density of solutions of dextrose, levu- 

 lose, and invert sugar, H. T. Brown, ('•. II. Morris, and .1. II. Millar (Jour Chem. 

 Soc. [London], 71 (1807), Xo. 412, p. 275). 



The experimental methods used in the examination of the products of the 

 dialysis of starch by diastase, II. T. Brown, (i. II. MORRIS, and J. If. Mili.ai: 

 (Jour. Chem. Soc. [London], 71 (1S97), p. 72; Chem. News, 75 (JSD7), Xo. 1989, p. 42). 



The relations between the specific rotatory power and the copper reduction 

 of the products of the hydrolysis of starch by diastase, II. T. Brown, G. H. 

 Morris, and J. II. Millar (Jour. Chem. Soc. [London], 71 (lS97),p. 11-',; Chem. Sexes, 

 75 (1807), Xo. 1939, p. 43). — When starch is hydrolyzed by diastase, there is a constant 

 relation between the specific rotation and the copper reduction of the products. 

 Soluble starch has the reducing power 0, (ajr> = 2i'L' . The reducing power of 

 maltose is placed at 100, («)d=-138 c . For every stage of the hydrolysis and every 

 fraction of the products (a) D =202 c — 6.64 R. — w. n. krug. 



The specific rotatory power of maltose and soluble starch, H. T. Brown, G. H. 

 Morris, and J. H. Millar (Jour. Chem. Soc. [London]. 71 (1897). Xo. 410. p. 109; Chem. 

 Xeics, 75 (1S97), Xo. 1939, p. 43). 



The pentosan content of cotton, H. Suringar and B. Toi.len- (Jour. Landw., ii 

 (1896), Xo. 4, p. 355). — Four hundred grams of pure cotton was heated with 4 liters 

 of 4 per cent sulphuric acid and a small quantity of siriqi obtained which yielded 

 crystals of dextrose. Only traces of fnrfurol were obtained on distillation with 

 hydrochloric acid. — w. H. KRUG. 



The pentosan content of various fodders and their fiber, F. During (Jour. 

 Landw., 45 (1897), Xo. 1, p. 79). 



The pentosan content of various materials which serve as fodders, B. Tol- 

 lens and H. Glaubitz (Jour. Landw., 45 (1807), Xo. 1, p. 97). 



The detection and quantitative determination of sucrose in wines, P. Kulisch 

 (Ztschr. angeiv. Chem., 1897, Xo. 7, p. 205). 



The determination of lactose in milk, H. D. Richmond and L. K. Boseley 

 (Analyst, 22 (1S97), Apr., p. 98). 



Miscellaneous analyses, A. A. Persons (Florida Sta. Bpt. 1896, pp. 61-64). — Analy- 

 ses with reference to fertilizing ingredients are given of coontie (Zamia integrifolia), 

 saw palmetto (Sabal serrulata), sponge Florida rock phosphate, and 7 samples of 

 muck. 



