802 EXPERIMENT STATION RECORD. [V»l. 37 



The occurrence of 1-leucin in sweet clover silage, G. P. Plaisance (Jour. 

 Amer. Chem. Soc, 39 {1917), Xo. 9, pp. 2087, 2088).— In the examination of 

 sweet clover silage for mannite by the author, at the Iowa Experiment Station, 

 no evidence of the substance was found. Instead a white substance crystallized 

 in little round masses, which after recrystallization from dilute alcohol was 

 identified as 1-leucin. In the samples of sweet clover silage examined leucin 

 was recovered in amounts ranging from 0.4 to 1 per cent of the dry material. 



The action of acids on the rotatory power of sucrose and invert sugar in 

 the presence of soluble salts, E. Saillakd (Compt. Rend. Acad. Sci. [Paris], 

 165 (1917), A'o. 5, pp. 116-118). — Data obtained in connection with work on 

 beet molasses show that sulphurous acid and acetic acid do not change the 

 rotatory power of sucrose in the presence of sodium chlorid. These acids do, 

 however, diminish the rotation of invert sugar in the presence of sodium chlorid, 

 with or without the addition of hydrochloric acid. Hydrochloric acid increases 

 the polarization of a solution of invert sugar in the presence of salt. The 

 solutions of invert sugar containing salt and sulphurous acid yield an unstable 

 polarization because of the easy loss of part of the dissolved gas. Carbon 

 dioxid does not influence the rotation of solutions of sucrose or invert sugar, 

 undoubtedly because of its slight solubility. 



Glycolytic properties of muscular tissue, R. IIoagland and C. ^I. Mansfield 

 {Jour. Biol. Chem., SI {1917), No. S. pp. 591-517). 



The function of muscular tissue in urea formation, R. Hoaciand and C. M. 

 Mansfield {Jour. lUol. Chem., 31 {1917), Xo. S. pp. ^S7-}99). 



Determination of carbonates in limestone and other materials, J. F. Barker 

 {Jour. IndH.'(. and Eugiu. Chem.. 9 {1917), No. 8. pp. 7>i6, 787, fig. /).— Essen- 

 tially noted from another source (E. S. R., 37, p. 616.) 



Insoluble phosphoric acid in organic base goods, E. O. Tuomas {Jour. 

 Indus, and Engin. Chem., 9 {1917), No. 9, p: 865). — Analytical data are sub- 

 mitted from which it is concluded that In the determination of citrate-insoluble 

 phosphoric acid the ofl!icial metliod gives the true value of acid phosphate, hut 

 that in the analysis of materials of the character of acidulated garbage tankage 

 some modification should be used. 



The decomposition of dilead arsenate by water, C. C. McDonnell and J. J. 

 T. Gkaham {Jour. Awer. Chem. .Soc, ,?9 {1917). Xo. 9, pp. 1912-1918. figs. 2).— 

 Experimental data obtained in the study show that dilead arsenate is decom- 

 posed by water. The reaction Is represented by the the equation 



5PbHA80« + HOH l=>Pb«(PbOH) (AsOJ, + 2H,A80«. 



The reaction proceeds with the liberation of ar.>;enic acid and the solution of 

 a very small quantity of lead. Equilibrium is reached while the concentration 

 of arsenic acid is very low. If the water is constantly changed, however, the 

 reaction proceeds until the residue is converted to a definite basic lead arsenate 

 (hydroxy mimetite, PKCPbOH) (AsO,),.HiO. 



Allen's commercial organic analysis, edite<l by W. .\. Davis {Philadelphia: 

 P. Bhihiston'.'* Son 6 Co., 1917, k. cd., rev., vol. 9. pp. XVI 1 1 +836, figs. 18).— 

 This is a supplementary volume to the work previously noted (E. S. R., 30, p. 

 309) which brings the text, especially that of the earlier volumes, up to date. 

 The chapters included are alcohols; malt and brewing materials; wines and 

 spirits ; yeast ; neutral alcoholic derivatives ; sugars ; starch and its isomerids ; 

 paper and paper-making materials; aliphatic acids; fixed oils, fats, and waxes; 

 special characters and modes of examining fats, oils, and waxes ; butter fat ; 

 lard; linseed oil; soaps; glycerol; cholesterol; wool, grease, and cloth oils; 

 hydrocarbons; bitumens; naphthalene and its derivatives; phenols; aromatic 

 acids; resins; India rubber, rubber substitutes, and gutta-iH?rcha ; essential 



