AGRICULTURAL CHEMISTRY. 909 



Detection and determination of nitric acid in water and sewage, Klut 

 (Mitt. K. Prilfunytianat. Wasscrvcv. u. Abwasacr. Berlin, 11)08, At». 10, pp. 85- 

 101 ; abs. in Chcin. Ztg., 32 (1908), No. 97, Repert., p. 632; Brewers' Jour., 33 

 (1909), No. 3, p. 107; asnrUits. Ingcn., 32 (1909), Xn. 16, p. 271).— An n qualita- 

 tive test for nitric acid brucin is preferred to diplienylaniin. For quantitative 

 determination the Scliulze-Tieniann method is rccouuuended. 'i'he I'isch metliod 

 is considered tlie next best. 



The determination of calcium carbonate in soils by the Bernard and 

 Treitz method and its importance in the selection of vineyard soil, K. 

 VoTRUBA (Allg. Wcin Ztg., 1908, No. 30, pp. I); abs. in Chem. Zcntbl., 1908, 

 II. No. 12, pp. 1065, 1066; Jour. Chem. Sac. [London], 96 (1909), No. 555, 

 II, p. 95). — The Treitz method, which depends upon the determination of the 

 calcium carbor.ate removed in suspension when soil is shaken with water, is 

 preferred to that of Bernard as a means of selecting vineyard soils. The lime 

 in tine soil is apparently of more importance than that in coarse lumps. Ac- 

 count must also be taken of other physical proi)erties in selectinjj vineyard soils. 



Ne .V method for the estimation of lactic acid in animal organs and fluids, 

 E. Jki';:salem (Bioclicin. Ztschr., 12 (1908), No. 5-6, pp. 361-389, figs. 2; iihs. in 

 Annlgst, 33 (1908), No. 393, pp. 47 Jf, ^75).— The author extracte<l the lactic 

 acid with ether and then oxidized by permanganate. The aldehyde formed is 

 estimatt'd by the iodoform method. 



The c uantitative estimation of creatinin in urine, G. Edlkfsen (Miinchen. 

 Mcil. A\vUn><vUr., 55 (1908), No. '/.'/. i>p. 252'i-2o27).—A critical discussion of 

 methods and a description of the procedure which the author reconuneuds. 



The determination of reducing' sugars from the weight of cuprous oxid, 

 C. A. Browne (Intcrnat. Sugar Jour., 10 (1908), No. 119, pp. 557-5-} 0).— Accord- 

 ing to the author's experiments, it is more accurate to weigh copper in sugar 

 determinations as CuO than as CU2O. 



The precipitation of reducing sugars with basic lead acetate, A. H. Bryan 

 (Intermit. Xiigar Jour.. 10 {1908), No. 120, pp. 602-605). — A contribution to the 

 subject of methods. 



Errors in the polarimetric determination of sucrose, when lead salts are 

 used as clarifying agents {Intcrnat. Sugar Jour., 10 (1908), No. 120, pp. 581- 

 583). — A digest of recently published data on this subject. 



Refractometer studies, F. G. Wiechmann (Internat. Sugar Jour.. 10 (1908), 

 No. 119, pp. 5.'f5-55.'i). — From the large number of determinations reported the 

 author concludes that " if the refractometer is to find a permanent i)lace in the 

 sugjir laboratory, it will be necessary to prepare a table of the i-efractive index 

 values of chemicallj' pure sucrose solutions, at some standard temperature, say 

 at L'0°." 



The determination of nonsaccharin organic material in cane molasses, 

 J. J. Hazevvinkkl (But. Aasoc. ('him. Sucr. et Distill., 26 (1908), No. .}. pp. 230- 

 247). — A study and comparison of methods. According to the author's observa- 

 tions, large quantities of mannose and glucose do not exist in defecation mo- 

 lasses. 



The resorcin hydrochloric acid reaction and its value in honey analyses, 

 liiEciiKN and I. FiKiiK (Chem. Ztg., 32 (1908), No. 90, pp. 1090. y^>.'//).— The 

 authors defend this reaction from the criticisms which have been made of it 

 and state that their studies of the reaction are being continued. 



The estimation of salt in imported pickled meat, G. (jRciNi.No {Ztschr. 

 Flcisch. u.'Milchhyg., 19 (1908), No. 1, pp. 12-15, fig. i).— The author describes 

 the ai»i)aratus and method which he has found convenient. 



The detection of white corn flour in wheat flour products, K. ('ARLiNFANrr 

 and (J. Salvatobi (Arch. I'armacol. Spcr. c Sci. Aff., 6 (1907), No. 8-9, pp. .'i58- 



