No. 4, February, 1922] PHYSIOLOGY 303 



resistant or non-resistant to lodging. This index, with remarkable accuracy, expresses 

 mathematically the exact conditions found to exist in the field; the varieties with a (+) index 

 always standing erect, those with a ( — ) index always lodging in the order of the absolute 

 value of the index number. — A. Bonazzi. 



1964. Gager, C. Stuart. [Rev. of: Reinheimer, H. Symbiosis : a socio-physlological 

 study of evolution. xii+295p. Headley Bros.: Loudon, 1920 (see BotAbsts. 10, Entry 19G6).] 

 Torreya 21 : 85-86. 1921. — The book is based on the thesis that everything normal in organic 

 evolution is due to essentially cooperative behavior. The reviewer indicates that numerous 

 statements about plants are inaccurate or incorrect, and sure to mislead readers unfamiliar 

 with botany. Maeterlinck's ideas on the intelligence of plants are apparently accepted 

 literatim. — /. C. Nelson. 



1965. HiTCHENS, A. P. Advantages of culture mediums containing small percentages of 

 agar. Jour. Infect. Diseases 29: 390-407. 1921. — It is suggested to use 0.1 per cent agar in 

 culture media for the primary cultivation of specimens suspected of containing anaerobic 

 bacteria and for the study of the physiological relations of pure cultures. This agar gel, 

 composed of colloidal particles in a state of equilibrium, resists the penetration of oxygen, 

 thus offering excellent conditions for the development of anaerobic bacteria and for bacteria 

 requiring partial oxygen tension. — Selman A. Waksman. 



1966. Reinheimer, H. Symbiosis: A socio-physiological study of evolution, xii+295 p. 

 Headley Bros.: London, 1920. — The present is not a scientific treatment of symbiosis but, 

 as the title indicates, a philosophical or "socio-physiological" discussion based on the phenom- 

 ena of symbiosis. Chapter V, The "Intelligence" of Plants, is based on Maeterlinck's 

 L'Inteliigence des Fleurs. In Chapter IV, Parasitism vs. Symbiosis, the author states that 

 "biologists fail to recognize that the principle of parasitism differs toto coelo from that of 

 symbiosis." [See also Bot. Absts. 10, Entry 1964.] — C. S. Gager. 



MOVEMENTS OF GROWTH AND TURGOR CHANGES 



1967. Langer, Helene. Zur Kenntnis der tropistischen Kriimmungen bei Lebermoosrhi- 

 zoiden. [Concerning the tropistic curvatures of liverwort rhizoids.] Ber. Deutsch. Bot. Ges. 

 37: 262-272. Fig. 1-2. 1919. — The gemmae of Lunularia vulgaris furnished the principal 

 material. Gemmae of Marchantia and thalli of Riccia fluitans were also used and gave results 

 similar to those with Lunularia. The rhizoids gave a positive geotropic reaction. Weak 

 unilateral illumination sufficed to suppress the geotropic curvature. The rhizoids proved 

 to be positively aerotropic and, according to the concentrations used, positively or negatively 

 chemotropic to KNO3 and grape sugar. With asparagin and tyrosin, in the concentrations 

 employed, only positive reactions were secured and with CaHP04 only negative reactions. — 

 B. M. Holman. 



1968. Liese, J. tJber den Heliotropismus der Assimilationszellen einiger Marchantiaceen. 

 [Heliotropism of the assimilating cells of certain of the Marchantiaceae.] Ber. Deutsh. Bot. 

 Ges. 37: 293-298. Fig. I-4. 1919. — This is a report of experiments with Marchantia poly- 

 morpha, Fegetella conica, and other Marchantiaceae. The author found that the direction 

 of illumination of the thalli determined the orientation of those filaments of assimilating 

 cells which developed during the exposure. — R. M. Holman. 



1969. Stark, Peter. tJber traumatotropische und haptotropische Reizleitungsvorgange 

 bei Gramineenkeimlinge. [On traumatotropic and[haptotropic stimulus conduction in seedlings 

 of the Gramineae.) Ber. Deutsch. Bot. Ges. 37: 358-363. Fig. 1-13. 1919.— The author 

 performed with wound- and contact-stimulated coleoptiles experiments similar to those which 

 Paal (Jahrb. Wiss. Bot. 58: 1918) performed with phototropicallj^ -stimulated coleoptiles. 

 The principal question which he sought to answer was whether a stimulus can be transferred 

 from one individual to another of the same or different species. The experiments showed that 



