Neue Literatztr. 



335 



Morphologie. 



Hayek, A., Definition der Begriffe Thallus und Kormus. (Verh. zool.-bot. Ges. 

 Wien. 1920. 70, [31]— [32]-) 



Physiologie. 



Acqua, C, The dynamics of plant respiration. (Sei. Am. Mo. ig2i. 3, 28 — 30.) 



Bailey, J. W,, The significance of the cambium in the study of certain physio- 

 logical Problems. (Journ. Gen. Phys. ig2o. 2, 519 — 535-) 



Bitting, K. G., The effect of certain agents on the development of some moulds 

 (Penicillium expansum, Alternaria Solani, and Oidium lactis). Washington. ig20. 

 176 S. 



Brooks, M. M., Comparalive studies on respiration. VIII. The respiration of BaciUus 

 subtilis in relation to antagonism. (Journ. Gen. Phys. igig- 2, 5 — 17.) 



— , Coraparative studies on respiration. X. Toxic and antagonistic effects of mag- 

 nesium in relation to the respiration of Bacillus subtilis. (Ebenda. ig20. 2, 



331—337-) 

 Chambers, R., Changes in protoplasmic consistency and their relation to cell division. 



(Ebenda, /p/p. 2, 49 — 69.) 

 Cohn, E. J., Groß, J., and Johnson, O. C, The isoelectric points of the proteins 



in certain vegetable juices. (Ebenda. 145 — 161.) 

 Espino, R. B., Some aspects of the salt requirements of young rice plants. (Phillip. 



Journ. Sei. ig20. 16, 455—523-) 

 Gile, P. L., and Carrero, J. O., Cause of lime-induced chlorosis and availability 



of iron in the soil. (Journ. Agr. Res. ig2o. 20, 33 — 61.) 

 Grier, N. M., Light correlated variations of the sterile stem of Equisetum sylva- 



ticum. (Rhodora. ig20. 22, 165 — 167.) 

 Gustafson, F. G., Comparative studies on respiration. IX. The effects of anta- 

 gonistic saks on the respiration of Aspergillus niger. (Journ. Gen. Phys. igig. 



2, 17-25-) 

 — , Comparative studies on respiration. XI. The effect of hydrogen ion concentration 



on the respiration of Penicillium chrysogenum. (Ebenda. ig20. 2, 617 — 627.) 

 — , Comparative studies on respiration. XII. A comparison of the production of 



carbon dioxide by Penicillium and by a Solution of dextrose and hydrogen 



peroxide. (Ebenda. 3, 35 — 41.) 

 Hampton, H. C, and Baas-Becking, L, G. M., The kinetics of the action of 



catalase extract from marine algae, with a note on oxidase. (Ebenda. 2, 635 — 651.) 

 Harvey, R. B., Apparatus for measurement of oxidase and catalase activity. (Ebenda. 



253 — 255-) 

 Hecht, S., The photochemical nature of the photosensory process. (Ebenda. 229 — 247.) 

 — , Intensity and the process of photoreception. (Ebenda. 337 — 349-) 

 Johnston, E. S., Nutrient requirement of the potato plant grown in sand. Cultures 



treated \\'\(h »Type I« Solutions. (Soil Sei. ig20. 10, 389 — 408.) 

 Lillie, R. S., The recovery of transmissivity in passive iron wires as a model of 



recovery processes in irritable living Systems. (Journ. Gen. Phys. ig20. 3, 



107 — 128 ) 

 Linhart, G. H., The free energy of biological processes. (Ebenda. 2, 247 — 253.) 

 Loeb, J,, Electrification of water and osmotic pressure. (Ebenda, igig. 2,87 — 106.) 

 — , Influence of the concentration of electrolytes on the electrification and the rate 



of diffusion of water through collodion membranes. (Ebenda. 173 — 200.) 

 — , Influence of a slight modification of the collodion membrane on the sign of the 



electrification of water. Influence of the concentration of electrolytes on some 



physical properties of coUoids and of crystalloids. (Ebenda. ig20. 2, 255 — 308.) 

 — , On the cause of the influence of ions on the rate of diffusion of water through 



collodion membranes. I and II. (Ebenda. 387 — 409, 563 — 577.) 

 - — , The reversal of the sign of the charge of membranes by hydrogen ions. (Ebenda. 



577—594-) 



