134 PHYSIOLOGY [Bot. Absts., Vol. V, 



950. Kondo, M. Ueber Nachreife und Keimung verschieden reifer Reiskorner (Oryza 

 sativa). [After-ripening and germination of rice seeds in various stages of maturity.] Ber. 

 Ohara Inst. Landwirtsch. Forsch. 1 : 361-387. 1918.— See Bot. Absts. 3, Entry 2805; 5, Entry 

 36. 



951. Russell, E. J. Report on the proposed electrolytic treatment of seeds (Wolfryn 

 process) before sowing. Jour. Ministry Agric. Great Britain 26: 971-981. 1920. — See Bot. 

 Absts. 5, Entry 59. 



952. SkArman, J. A. O. Ett bidrag till fragan om temperaturens betydelse for fronas 

 groning hos Geranium bohemicum L. [A report on the question of the importance of tempera- 

 ture for the growth of seed of Geranium bohemicum.] Svensk. Bot. Tidskr. [Stockholm) 13: 

 93-97. 1919. — The author has observed that seeds of Geranium bohemicum are capable of 

 withstanding very high temperatures and of remaining viable for many years. They also 

 seem to require special conditions including exposure to considerable heat to bring about 

 germination, as shown by their occurrence only on burned over land. — W. W. Gilbert. 



953. Stormer. Keimungshemmungen bei blauen Lupinen. [A case of arrested germina- 

 tion in blue lupines.] Illustrierte Landw. Zeitg. 39: 12. 1919. — See Bot. Absts. 5, Entry 63. 



RADIANT ENERGY RELATIONS 



954. Daniel, Lucien. Recherches sur le developpement compare de la laitue au soleil 

 et a l'ombre. [Development of lettuce in sun and shade.] Compt. Rend. Acad. Sci. Paris 

 168: 694-696. 1919. — The author reports the effect of shade on the development of lettuce 

 plants and discusses in a general way the relation of illumination to the duration of species, 

 giantism, and dimorphism. — F. B. Wann. 



955. Schanz, F. Effect of light on living organism. Sci. Amer. Supplem. 88: 179. 1919. 

 [Translated from Meteorolog. Zeitschr. (Braunschweig).] 



956. Tsuji, T. The action of ultra-violet rays on sugar-cane, pineapple and banana in 

 Hawaii. Sci. Amer. Supplem. 87: 327. 1919. [From Louisiana Planter and Sugar Manu- 

 facturer.] — Investigations on the connection between the action of ultra-violet rays and the 

 formation of carbohydrates, acids, and other compounds. — Chas. H. Otis. 



TEMPERATURE RELATIONS 



957. Edson, H. A., and M. Shapovalov. Temperature relations of certain potato-rot 

 and wilt-producing fungi. Jour. Agric. Res. 18: 511-524. 9 fig. 1920. — See Bot. Absts. 5, 

 Entry 740. 



958. Potter, George F. An apparatus for automatically changing the temperature of a 

 chamber. Amer. Jour. Bot. 7: 39-43. 3 pi. 1920. — In order to obtain a uniform and known 

 rate of temperature fall for experiments dealing with the injury of plant tissues by low tem- 

 peratures, the author has devised a cooling chamber in which the rate of temperature change 

 is automatically controlled by clockwork. This apparatus is described in detail. — E. W. 

 Sinnott. 



959. Siireve, Edith Bellamy. A thermo-electrical method for the determination of 

 leaf temperature. Plant World 22 : 100-104. 2 fig. 1919. — A method of determining leaf tem- 

 peratures without wounding the tissues is described. The apparatus consists of a pair of 

 thermocouples and a portable galvanometer sensitive to 0.1°C., with damping key, arranged 

 compactly on a board supported on a camera tripod. A reading can be made in a fraction of 

 a second. — Charles A. Shull. 



