34 CIECUMNUTATION OF SEEDLINGS. Ohap. I. 



narrow leaf, is shown during 24 h., in Fig. 24. No glass filament 

 was employed, but a mark was placed beneath the apex of the 

 leaf. The actual length of the longer of the two ellipses de- 

 scribed by the stem was about -14 of an inch. On the previous 

 day the chief line of movement was nearly at right angles to 

 that shown in the present figure, and it was more simple. 



Cassia tora* (Leguminosse).— A seedling was placed before a 



Fig. 25 



T ia'a.m.SS^ 



S'a.tn 



Oastia tora ; conjoint circumnutatiOTi of cotyledons and hypocotyl, trawd 

 on vertical glass, from 7.10 a.m. Sept. 25th to 7.30 a.m. 26th. Figure 

 here given reduced to one-half of original scale. 



* Seeds of tliia plant, whicli 

 grew near the sea-side, were sent 

 to us by Fritz MuUer from S. 

 Brazil. The seedlings did not 



flourish or flower well with us; 

 they were sent to Kew, and were 

 prouounced not to bo distinguish- 

 able from C. tora. 



