33] Stoffumsatz 525 
392. Daniel, L.. Nouvelles recherches sur la migration de 
l’inuline dans les greffes de Composees. (©. R. Acad. Sci. Paris 177, 
1923, p. 1135 —1137.) 
393. Daniel, L. Nouvelles recherches sur la migration de 
l’inuline chez les Helianthees greffees. (Trav. Sci. Univ. Rennes 17, 
1924, p. 21—83, 14 Fig., 31 Taf.) — Ref. in Bot. Ctrbl., N. F. 5, 1925, p. 144. 
394. Daszewska, W. Etude sur la desagregation de la cellulose 
dans la terre de Bruyere et la Tourbe. These Geneve 1924, 61 pp., 
31 Textfig. — Ref. in Bot. Ctrbl., N.F. 5, 1925 p. 148. 
395. Davidson, J. Is gaseous nitrogen a product of seedling 
metabolism? (Bot. Gazette 76, 1923, p. 95—101.) — Ref. in Bot. Ctrbl., 
N.F.3, 1924, p. 430. 
396. Davidson, J. and LeClere, J. A. Effect of various inorganie 
nitrogen compounds, applied at different stages of growth, on 
the yield, composition and quality of wheat. (Journ. Agr. Research 
23, 1923, p. 55—68.) — Ref. in Bot. Ctrbl., N.F. 3, 1924, p. 105. 
397. Efiront, J. Iniluence de la pulpe vevetale sur les con- 
ditions chimiques du milieu et sur la coordination du travail 
des catalyseurs biochimiques. (C. R. Soc. Biol. 88, 1923, p. 132—135.) 
398. Efiront, J. Influence de la constance du milieu sur le 
developpement et le travail chimique des micro-organismes. 
(©. R. Soc. Biol. 91, 1924, p. 1175—1178.) — Ref. in Bot. Ctrbl., N. F. 5, 1925, 
p. 214. 
399. Elion, L. A thermophilice sulphate-reducing Bacterium. 
(Ctrbl. f. Bakt., Abt. II, 63, 1924, p. 58—66, 1 Taf.) — Ref. in Bot. Ctrbl., 
N.F.5, 1925, p. 225. 
400. Euler, H. v. und Myrbäck, K. Zur Kenntnis des biochemi- 
schen Kohlenhydratabbaues. FEinleitende Mitteilung. (Svensk 
kemisk tidskr., 36, 1924, p. 295—306, 1 Textfig. u. 19 Texttab.) — Referat 
in Chem. Ztrbl. 1, 1, 1925, p. 698. Porkka 
401. Eyster, W. H. Inherited deficiencey in carbohydrate meta- 
bolism in Maize. (Bot. Gazette 78, 1924, p. 446—452, 3 Fig.) — Ref. in 
Bot. Ctrbl., N. F. 5, 1925, p. 403. 
402. Fischer, Fr. Über das Verhalten von Zellulose nd Lignin 
bei der Vermoderung. (Brennstoff-Chemie 5, 1924, p. 132— 133.) 
403. Freundler, P. Sur les conditions de stabilisation de l’iode 
chez les L[aminaria] flexicaulis. (C. R. Acad. Sci. Paris 179, 1924, p. 1421 
bis 1422.) | 
404. Garner, W. W., MeMurtrey, J. E., Bacon, €. W. and Moss, E. 6. 
Sand Drown, a Chlorosis of Tobacco Due to Magnesium Defi- 
ciencey, and the Relation of Sulphates and Chlorids of Potassium 
to the Disease. (Journ. Agric. Research 23, 1923, p. 27—40, 7 pl.) — „Sand 
drown, a chlorosis of tobacco involving both the green and the yellow pigments 
of chlorophyll, is due to magnesium deficieney and is markedly aggravated 
by an increased sulphur supply. For these reasons the use of potash salts of 
high purity (free from magnesia) and, especially, pure forms of the sulphate 
have resulted in serious damage to the crop. The need for magnesium is readily 
met by the use of sulphate of potash containing magnesia or by applying 
lime containing magnesia. One of the functions of organic matter of vegetable 
origin, as cottonseed meal, tobacco stems, and barn manure and of lime, is 
