No. 2, March, 1921] PHYSIOLOGY 197 



1323. Rosenheim, Otto. Note on the use of butyl alcohol as a solvent for anthocyanlns. 

 Biochem. Jour. 14: 73-74. 1920. — The author finds butyl superior to amyl alcohol as a solvent 

 for anthocyanin, the former removing all the anthocyanins, (mono- and rhamno-glucosides, 

 as well as normal glucosides) while in the latter the first two groups of glucosides alone are 

 soluble to any great extent. The method of extraction with this solvent is described. — Alva 

 R. Davis. 



1324. Rosenheim, Otto. Observations on anthocyanins. I. The anthocyanins of the 

 young leaves of the grape vine. Biochem. Jour. 14: 178-188. 1 fig. 1920. — The red pigment 

 of the grape was isolated in crystalline form and found to be probably identical with oenidin, 

 the non-glucosidic component of the purple grape. The occurrence of a colorless modifica- 

 tion of the pigment was demonstrated, present in combination possibly with a carbohydrate 

 or other complex and is converted into anthocyanidin by strong acids. The European species, 

 Vitis vinifera, seems the only member of the genus to produce free anthocyanidin, and the 

 bearing of this on genetic problems is discussed. — Alva R. Davis. 



1325. ScHOORL, N. Zur Titration von Zuckerarten. [Titration of sugars.] Zeitschr. 

 Untersuch. Nahrungs- u. Genussmittel 39: 180-182. 1920. 



1326. Simpson, Jos:fi Agustin. Estudio sobre al acido cianhidrico en el Phaseolus lunatus 

 (Frijol de Birmania). Discurso de recepcion como academico de numero. [Hydrocyanic acid 

 in Phaseolus lunatus (Birmania bean). Address delivered on becoming a member of the 

 Academy.] An. Acad. Cien. Habana— Rev. Cien. 55: 250-'283. 10 fig. 1919.— See Bot. 



Absts. 7, Entry 1288. 



1327. Venn, Elfrida C. V. The influence of reaction on colour changes in tyrosine solu- 

 tions. Biochem. Jour. 14: 99-102. 1 fig. 1920.— This study has to do with the effect of vary- 

 ing degrees of acidity and alkalinity upon colors produced by one strain of bacteria upon a 

 single amino acid. — Alva R. Davis. 



1328. Whipple, Bertha K. Water-soluble B in cabbage and onion. Jour. Biol. Chem. 

 44: 175-187. 1920.— Not more than one-half the water-soluble B is lost in the cooking water 



from cabbage or from onions boiled for 30 minutes. — G. B. Rigg. 



..:;■■ !\ 

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METABOLISM (NITROGEN RELATIONS) '■ 



1329. Ammann, p. Sur la grande richesse en matieres azotees de certains maniocs du 

 Cambodge. [On the large amount of nitrogenous matter in certain Cassavas of Cambodge.] 

 Compt. Rend. Acad. Sci. Paris 170 : 1333-1334. 1920.— It is found that the amount of nitrogen 

 compounds in these varieties is 2.93 per cent to 7.43 per cent as compared with the varieties of 

 other localities which yield only 0.74 per cent to 1.49 per cent. — C. H. Farr. 



1330. Bezagtj, Maurice. Variations de la respiration des cellules de feuille avec I'fige. 

 [Variations in the respiration of cells of the leaf with age.] Compt. Rend. Acad. Sci. Paris 169: 

 701-702. 1919. — Studies were made on the leaves of Robinia pseudacacia, Pinus silvestris, 

 Coboea scandens, Ligusirtim vulgare, Althaea, Loroglossum hircinum, and Cercis siliquastrum. 

 Respiration, which is very weak in the young leaf, increases to a maximum which corresponds 

 to the period at which the leaf reaches its full development. As the leaf becomes still older, 

 the intensity of its respiration decreases. — V. H. Young. 



1331. BoTTOMiiEY, W. B. The effect of nitrogen-Sxing organisms and nucleic acid deriva- 

 tives on plant growth. Proc. Roy. Soc. London B, 91 : 83-95. 1920.— The author has pre- 

 viously shown that Lemna minor grows much better when an extract of bacterized peat is 

 added to inorganic nutrients, and in this investigation he tries to determine the factors re- 

 sponsible. Autoclaved growth masses of Azotobacter chroococcum added to Detmer's solu- 

 tion caused greatly increased growth and dry weight of plants over those grown in unmodi- 



