15 
drawn out two days, but some other number of days ahead. It will be 
seen that of the forecasts just quoted only 10 (under one half) are two 
days ahead, and the others, 4 One three, four, &c., days ahead. 
To take a succinct case : 
On October 19th the plants foretold weather for the 21st 
3 20th i 24th 
m 21st 93 ds » 22nd 
” 22nd , ” 23rd 
” 23rd ” » 25th 
On October 19th one of the numerous “ Epe, took place, and for 
three days the plant ceased to foretell two days ahead. On the 1 
the forecast was for the 21st, whilst on the 20th it jumped to the 24th, 
and on the 21st back to the 22nd. 
Very few of the * changes " in October were — M by Mr. 
Nowack—indeed, only on ey were needful in order to make the 
prophesied and actual weithio and the prophesied sai actual barometric 
charts fit to a certain extent. I cannot say that the series of weather 
forecasts above given, arranged, as they are, in the order most favourable 
impressed with the extraordinary sensitiveness of their leaflets to 
alterations in the wer d of the light, and the view which I first 
formed as to the nature of their up and down movements was, in the 
main, that they were called forth by fluctuations in the intensity of the 
o through I have failed to notice anything to shake this 
instance, some distance below the horizontal a forecast would be made 
of clouding up, or even a a shower, to occur 48 hours afterwards. 
it is the 'T-plants which first intimate a decline in the li ht-intensity as 
in the afternoons. ces: Mr. Nowack separates the T-plants by noting 
day by day which go to sleep first in the afternoons. The positions 
the leaflets on different sides of the same plant are dependent on the 
> * 
by pu I am mt EE any ‘ew proper of ge Peete 
o 
tions Beer should be made more especially to the 
EU UN hea the Darw: s precatorius without doubt 
—. shows sleep movement, which di Fers only in degree from that of Robinia 
