402 W. Wendler: Chemische Physiologie 1917— 1919 [146 



bezug auf ihren auffallend niedrigen Gehalt an Trockensubstanz, Zellulose und 

 Aschenbestandteilen. Collander. 



982. Söderberg, Ivaiv Jämförande undersökningar över 

 olje halten hos rhizom av Valeriana officinalis L. och V. sambucifolia 

 M i k. [Vergleichende Untersuchungen über den Ölgehalt beim Rhizom von 

 Valeriana officinalis und V . sambucifolia.] (Svensk farmaceutisk Tidskr. XXI, 

 1917, p. 481 — 482.) — Valeriana sambucifolia übertrifft V . officinalis in bezug 

 auf den Gehalt an ätherischem Öl und besonders in bezug auf den Gehalt an 

 freier Valeriansäure. Collander. 



983. Späth, E. Ü b e r d i e Anhalonium - A 1 k a 1 o i d e. I. A n h a 1 i n 

 und Mercalin. (Sitzungsber. Akad. Wiss. Wien, Math.-Naturw. KL, 

 Abt. IIb, 127. Bd., 1918, p. 825—850.) 



984. Spiegel, L. Beiträge zur Kenntnis der Saponine. I. 

 Spiegel, L. und Meyer, Arthur. Untersuchung der Saponine von 

 Bassia longifolia. (Ber. D. Pharm. Ges. 28, 1918, p. 100—12(3.) 



985. Spoehr, H. A. The carbohydrate economy of cacti. 

 (Carnegie Inst. Washington Year Book Nr. 17 [1918], 1919, p. 61—63.) 



986. Spoehr, H. A„ T h e carbohydrate economy of the cacti. 

 (Carnegie Inst. Washington, Publ. Nr. 287, 1919, 79 pp., mit 2 Textfig.) 



987. Standford, Ernest E. and Viehoever, Arno. Chemistry and 

 histology of the glands of the cotton plant, withnotes on 

 the occurrence ofsimilar glands in related plant s. ( Journ. 

 Agric. Res. 13, 1918, p. 419—435, mit 9 Taf.) — Summary: „1. Internal glands 

 of lysigenous formation are found in the primary cortex, foliage, flower, and 

 seed of Upland cotton {Gossypium hirsutum). 2. The secondary cortex contains 

 glands of a similar type. Some of these appear to be developed from the 

 enlargement of a Single cell. 3. The glands in portions of the plant which are 

 exposed to light are surrounded by an anthocyan-bearing envelope of 

 flattened cells, and contain quercitrin, probably partly or wholly in the form 

 of its glucosids quercimeritrin or isoquercitrin, ethereal oil, resins, and perhaps 

 tannins. 4. The glands not normally exposed to the light are surrounded by 

 a layer of flattened cells containing no anthocyans; they contain gossypol. 

 5. Gossypol is formed in the glands of the developing corolla; on their exposure 

 to light it is replaced by quercimeritrin. 6. Gossypol in the unfolding cotyledons 

 is changed, probably through oxidation, without the formation of quercimeritrin. 

 7. Internal glands of the type described are universally present within Gossy- 

 pium spp. 8. Internal glands occur to some extent within the related genera, 

 Thespesia, Cienfuegosia, Erioxylon, and Ingenhonzia. 9. Four types of glands 

 which function as nectaries occur in G. hirsutum. These differ morphologically 

 from the internal glands and have no connection with them." — Vgl. Ref. 

 Nr. 1010. 



988. Steinmann, A.B. Studien über d i e A z i d i t ä t des Zell- 

 saftes beim Rhabarber. (Ztschr. f. Bot. 9, 1917, p. 1—59.) — Ref. in 

 Bot. Ctrbl. 140, 1919, p. 107. 



989. Stoklasa, Julius (unter Mitwirkung von J. Sebor, W. Zdobnicky, 

 F. Tymich, O. Horak und J. Cwach) . Über die Verbreitung des 

 Aluminium-Ions in der Pflanzenwelt. (Biochem. Ztschr. 88, 1918, 

 p. 292—322.) — Zusammenfassung: „I. Aus unseren Beobachtungen geht her- 

 vor, daß sich alle Pflanzenorgane der Xerophyten durch einen kleinen Alu- 



