CAMRUNGA. 
141 
sometimes a leaflet, especially on the inner side, 
does not move at all, whilst those above and below 
it are affected in their proper time. On making a 
compression with a pair of pincers on the common 
leaf-stalk, between any two pair of leaves, those 
above the compressed part, or nearer the extremity 
of the stalk, move sooner than those under it, or 
nearer the origin ; and frequently the motion will 
extend upwards to the end leaflet, whilst below per- 
haps it does not go further than the first pair. If 
the leaves happen to be blown by the wind against 
one another, or against the branches, they are fre- 
quently put in motion ; but when a branch is 
moved gently, either by the hand or the wind, 
without striking against any thing, no motion of the 
leaves takes place. 
When left to themselves in the day-time, shaded 
from the sun, wind, rain, or any disturbing cause, 
the appearance of the leaves is different from that 
of other pinnated plants. In the last a great uni- 
formity subsists in the respective position of the 
leaflets ; but here some will be seen on the hori- 
zontal plane, some raised about it, and others fallen 
under it ; and in the space of an hour or two, all 
these will have changed their respective positions, 
without having observed any order or regularity in 
their movement. 
After sun-set the leaves go to sleep, first moving 
down so as to touch one another by their under 
sides; they therefore perform rather more extensive 
motion at night of themselves than they can be 
