Botany and Zoology. 245 
Ill. Botany anp Zooroey. 
1. The Power of Movement in Plants ; by Cuartes Darwin 
LL.D., F.R.S., assisted by Francis Darwin.’ With illustrations. 
(London: John Murray. 1880, pleton & Co 
ing Plants,” and of “Insectivorous Plants,” of which it is the 
proper continuation and supplement. 
The organs of plants take certain determinate positions and 
triking 
strange, most—but not quite all of them—evidently advanta- 
t 
Successively to all points of the compass, and this wholly irre- 
‘spective of external influences; and the twining around a su 
bike 1s a direct consequence of the circumnutation. Most tendrils 
rely circumnutate, and thereby are enabled to reach the object _ 
Which they gra i 
“deepen to which they respond by movement change of 
ae a us they grasp or do other advantageous acts. So 
ve . : ; 
small leaflets of Desmodium gyrans, proceed irrespective of night 
and day, he specification need not extended. The general 
facts in all t 
; ing P . ‘ 
g 
—s 
TR 
co 
go 
i | 
° 
® 
fe) 
S 
fe 
5 
3 
Ps 
are 
i) 
— 
-_ 
~ 
g 
< 
c 
nm 
~ 
is 
mh 
fa) 
cet 
° 
- 
cI 
= 
_— 
=] 
gg 
~ 
= 
poy 
ri ‘r a more developed manifestation of a general faculty. And 
© Same is to be said of the movements of tendrils and leaves, 
dete nda i 
uttation or stimulus. All this is what the experimental re- 
Searches detailed in this volume undertake to ascertain and have 
rily made out, 
