410 experiiw:ent station record. [Voi.st 



The arsenates of lead. — III, Basic arsenates, C. C McDonnell ami C. M. 

 Smith {Jour. Amer. Chetn. Soc, S9 (1911), No. 5, pp. 9S7-94S). — Ck)ntlnuing 

 previous work (E. S. R., 36. p. 501) the authors describe the preparation and 

 properties of a number of basic arsenates of lead. 



Indirect measurements of the rotatory powers of some alpha and beta 

 forms of the sugars by means of solubility experiments, C. S. Hudson and E. 

 Yanovsky {Jovr. Amer. Chew. Soc.. 39 {1911). Xo. 5, pp. 101S-10S8). 



The preparation of beta glucose, A. W. Mangam and S. F. Agree {Jour. 

 Amer. Chem. Soc, 39 {1911), No. 5, pp. 965-968). 



The preparation of xylose, C. S. Hudson and T. S. Harding {Jour. Amer. 

 Chem. Soe., 39 (1911), No. 5, pp. 1038-10.^0). — A procedure for preparing xylose 

 from cottonseed hulls is described. The yield obtained varies from 8 to 12 

 per cent, and the first lot of crystals obtained are almost colorless and pure. 



On the cleavage in starch grains, A. Reuss {Ztschr. Unter.rnch. Nahr. u. 

 Genussmtl.. 32 {1916), No. 6, pp. 269. 210. figs. 6).— In the examination of a 

 .sample of bouillon cubes, starch grains were observed which exhibited peculiar 

 cleavage. The cubes contained 50 i>er cent sodium chlorid. A preliminary .study 

 of the effect of various solutions on the cleavage of different kinds of starch 

 grains was made, and the results are briefly noted. 



The determination of gelatinization temperatures of starches by means of 

 an electrically heated chamber on the microscope stage, A. \V. Dox and G. W. 

 RoARK, JB. {Jour. Amer. Chem. Soc., 39 {1911), No. 4, pp. 7-}2-7i5).— The 

 authors, at the Iowa Experiment Station, describe an apparatus similar to that 

 previously notetl by Francis and Smith (E. S. R., 35, p. 108). In the modifie<l 

 apparatus the chamber containing the slide is electrically heated. The manipu- 

 lation of the apparatus and the procedure for determining the gelatinization 

 temperature are described in detail. 



The gelatinization temperature of starches of 13 different varieties of corn 

 are submitted in tabular form. 



Inflammability of carbonaceous dusts in atmospheres of low oxygen con- 

 tent, H. H. Brown and J. K. Clement {Jour. In(fu-'<. atid Kngin. Chem., 9 {1911), 

 No. 4, pp. 341SJ,9. fig. i).— Continuing previous work (E. S. R.. 37, p. 109) it 

 has been shown that an inert gas mixture containing 12 per cent or less of 

 oxygen would prevent a dust explosion from starting or propagating. 



Hydrolysis of the soluble protein of Swede turnips, O. Williams {Jmtr. 

 Agr. Sri. [England], 8 {1911). No. 2. pp. 1S2-215). — The following percentage 

 comjiositlon of the protoin obtained from the Juice of Swede turnips (ruta- 

 bagas) by heating to 90° C. for one-half hour is reported: Glycin, 0.27; alanin, 

 3.58; valin, 9.95; leucin and Isoleucin, 9.01; phenylalanin, 4.47; tyrosin. 2.92; 

 cystin, present; prolin, 4.17; aspartlc acid. 6.98; glutamlnic acid, 3.18; trypto- 

 phan, present; arginin. 3.12; hlstldln, 3.04; lysin, 4.35; ammonia, 1.21; humin 

 bodies, 4.74 ; total, 60.99. One preparation of the protein preparetl containe*! 

 14.09 per cent of nitrogen, 1.81 per cent of water, and 8.6 per cent of ash. 



The procedures of Kossol and Kutscher, the ester method, and methods for 

 i.«!olatlng Individual amino acids were used. The procedures are described In 

 detail and the analytical data obtained discussed. 



Experimental investigations of the plum (Prunus domestica). — II, Com- 

 position of plum seed oil, U. Feruglio and G. B. Bernardis {R. Lab. Chim. 

 .\gr. Vdine Ric. Sper. e Attiv. Spiegnta, J, {1911-1914), pp. 111-118).— Experi- 

 mental data relative to the physical and chemical constants and color reactions 

 of the oil obtained by (!ther extraction of the finely ground material and quali- 

 tative tests of tlie fatty acids of the oil are submitted. 



