428 



MODIFIED CIRCUMNUTATION. CHAP. VIII. 



blinds being left suspended. In Fig. 173 the course pursued, 

 between 8.9 A.M. and 7.10 P.M., by one of the hypocotyls thus 



Fig. 173. 



11: 



Brassica oleracea : heliotropic movement and circumnutation of a hypocotyl 

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

 glass 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. the hypocotyl moved obliquely from the light, and this, 



