426 



MODIFIED CIKCUMXUTATION. Chat. VUL 



blinds bemg left suspended. In Fig. 173 the couise pursued, 

 between 8.9 a.m. and 7.10 p.m., by one cf the hypocotyls tluia 



Brassica oleracea : heliotropic movement and circumnutation of a hypocoty! 

 towards a very dim lateral light, traced during 11 hours, on a horizontal 

 glnss in the morning, and on a vertical glass in the evening. Figure 

 reduced to one-third of the original scale. 



exposed is shown. It may be observed that during the first 

 16 m. tl.e hypocotyl moved obliqnely from the light, and this. 



