Physiologie. 355 



Conover, L. L., Behavior of Aspava^its phimosus toward 

 light. (Plant World. XVI. p. 61—68. 191.3.J 



The frequently observed bending of ihe non-tvvinjng shoots of 

 A. plmnosus to the horizontal usually begins as a response to lateral 

 heliotropic Stimuli, which force it from the vertical, the assumption 

 of the horizontal position marks a change in the shoot response 

 from negative geotropic to digeotropic. In these responses the shoot 

 remains morphologically and physiologically radial. 



During young growth, nutation movements are observable which 

 are due to lateral access of light. At night these are not apparent. 

 the shoot instead responding in a negatively geotropic manner. 

 Just before cessation of growth and after the shoot has taken the 

 transverse position, nutation movements from the horizontal are 

 made which simulate wilting and recover\'. 



A. R. Davis (St. Louis). 



Copeland, E. B., Daily growth movements of Lager stroetnia. 

 (Phillipine Jour. Sei, VII p. 287—298. 1913.) 



Reports a nyctinastic growth movement in leafy growing bran- 

 ches of Lagerstyoemia speciosa. The curvature begins about 11 o'clock 

 in the morning and is completed by 8 o'clock at night. The amount 

 of elongation is frequently 60 per cent of the length of the zones 

 measured and in one case was as much as 220 per cent. Gravity 

 and epinasty are held to be the factors concerned in causing this 

 curvature. L. O. Overholts (St. Louis). 



Harris, J. A., A first study ofthe relationship between 

 the weight of the bean seed, Phaseolus vulgaris and the 

 time required for its germination. (Plant World. XVI. 

 p. 267-274. 1913.) 



Results obtained with seeds of several varieties of Phaseolus 

 vulgaris indicate very strongly the high probability for a correlation 

 between the weight of the seed and the time required for its ger- 

 mination, this germination time increasing with the seed weight. 

 Some varieties showed a stronger correlation than did others and 

 it is supposed that the age of the seed or the conditions under 

 which it was grown might influence the strength of this relationship. 



A. R. Davis (St. Louis). 



Hasselbring, H. H., The relation between the transpiration 

 stream and the absorption of salts. (Bot. Gaz. LVII. p. 72—73. 

 1914.) 



Contrasting the data for tobacco plants grown in partial shade 

 with those exposed it is shown that the absorption of salts is inde- 

 pendent of the transpiration quantities. Duggar (St. Louis;. 



Hill, G. A.. Respiration of fruits and growing plant tissues 



in certain gases, with reference to Ventilation and fruit 



storage. (Cornell Agr. Exp. Sta. Bul. 330. p. 373-408. 1913.) 



From observations of the effect oftransportation conditions upon 



certain fruits shipped to market the author was led to investigate 



various phases of respiration by fruits and seeds. The amount of 



