19] Wachstum. — Allgemeines 593 
Wachstum von Zuckerrübe, Hafer und Buchweizen. (Zeitschr. d. 
Ver. D. Zuckerind. 1923, 808. Liefg., p. 394—420, 3 Fig.) 
206. Lesage, P. Sur la persistance des caracteres provoques 
par la salure. (C.R. Acad. Sci. Paris 176, 1923, p. 257—-260.) — Ref. in 
Bot. Ctrbl., N. F.3, 1924, p. 42. 
207. Lundegärdh, H. Die Bedeutung des Kohlensäuregehalts 
und der Wasserstoffionenkonzentration des Bodens für die Ent- 
wicklung der Fusariosen. (Bot. Not. 1923, p. 25—52, mit 6 Textfig.) — 
Ref. in Bot. Ctrbl., N. F. 3, 1924, p. 94. 
208. MacDougal, D.T. Annual report of the director of the 
laboratory for plant physiology. (Carnegie Inst. Washingt. Year Book 
23, 1924, p. 125—143.) — Ref. in Bot. Ctrbl., N. F. 6, 1925, p. 10—11. 
209. MaeDougal, D. T. and Shreve, F. Growth in trees and massive 
organs of plants. (Carnegie Inst. Washington Publ. 350, 1924, 116 pp., 
29 Fig.) — MacDougal, D. T.: Dendrographic measurements, 
p- 1-89; Shreve, F.: The growth record in trees, p. 89—116. — Ref. 
in Bot. Ctrbl., N. FE. 5, 1925, p. 203—205. 
210. Malloch, W.S. Asexual propagation as an aid to the 
breeding of rootstocks. (Journ. Agric. Research 29, 1924, p. 515—521, 
1 Taf.) — Ref. in Bot. Ctrbl., N. F. 6, 1925, p. 268. 
2]1. MeHargue, J.S. Effect of different concentrations of 
manganese sulphate on the growth of plants in acid and neutral 
solls and the necessity of manganese as a plant nutrient. (Journ. 
Agric. Research 24, 1923, p. 781—-794, 2 Taf.) — Ref. in Bot. Ctrbl., N. F. 3, 
1924, p. 359. 
212. Mitscherlich, E.A. Die Kohlensäure als Wachstumsfaktor 
der Pflanzen. (Zeitschr. f. Pflanzenernährung A 2, 1923, p. 211—214.) — 
Ref. in Bot. .Ctrbl., N. FE. 3, 1924, p. 357. 
213. Newton, W. The rest period of Solanum tuberosumin relation 
to available nitrogen. (Science N. S.58, 1923, p. 207—208.) — Ref. in 
BOba&tLbISENGNL3,1924502 327. 
214. Pantanelli, E.E Influenza delle condizioni di vita sullo 
sviluppo di alcune alghe marine. (Arch. di science biol. 4, 1923, p. 21 
bis 87.) — Ref. in Bot. Ctrbl., N. F. 3, 1924, p. 197. 
215. Reed, E.E Hypothesis of formative stuffs as applied to 
Bryophyllum calycinım. (Bot. Gaz. 75, 1923, p. 113—142, 10 Fig.) — Ref. 
in. Bot. Ctrbl., N. F. 3, 1924, p. 166-167. 
216. Reed, H.S. A note on the statistics of ceyclice growth. 
(Proc. Nation. Acad. Sci. Washington 9, 1923, p. 65—66.) 
217. Reed,H.S. The nature of growth. (Amer. Naturalist 58, 
1924, p. 337—349.) — Ref. in Bot. Ctrbl., N. F.5, 1925, p. 17—18. 
218. Reed, N. S. and Haas, A.R. C. Growth and composition of 
orangetrees in sand and soil eultures. (Journ. Agric. Research 24, 
1923, p. 801-814, 5 Taf.) 
219. Reinau, E. Kritische Bemerkungen zum Wirkungsgesetz 
der Wachstumsfaktoren bei Kohlensäuredüngung. (Angew. Bot. 4, 
1924, p. 361—394.) — Ref. in Bot. Ctrbl., N. F.5, 1925, p. 273. 
