274 MR. C. DARWIN ON THE ACTION OF 
hardly be a doubt that in four out of these five tentacles the 
chlorophyll-grains had been reformed. On one of the much- 
injured leaves, in which the glands of the central tentacles were 
still opague, the cells in their footstalks contained some aggre- 
gated and some brownish granular matter; and here minute 
globules were arranged along the walls of the cells in the places 
where chlorophyll-grains ought to have stood ; but whether these 
were remnants which had never wholly disappeared or new grains 
reforming could not be ascertained. 
Drops of a weaker infusion of raw meat were next placed on 
seven reddish leaves, which were all greatly acted on ; but the 
infusion was still rather too strong. In from 24 to 25 hours 
afterwards all the leaves were well syringed ; and small pieces 
having been eut off two of them, several of the short central ten- 
tacles were examined. In one of these leaves a very few chloro- 
phyll-grains could be seen in some few cells in one of the ten- 
tacles which had not undergone so much aggregation as the 
others. Im the piece from the second leaf not a single chloro- 
phyll-grain could be distinguished in any of the short central 
tentacles. The sections were then immersed in alcohol, and in a 
few minutes all the aggregated masses were broken up into very 
fine granular matter; but no chlorophyll-grains could be seen, 
except in the one tentacle above mentioned. In three days after 
the drops had been first given, four of the leaves (including one 
of those from which a small piece had been cut off) looked vigo- 
rous, and were fully or almost fully expanded. The fifth leaf, from 
which a piece had likewise been cut off, appeared somewhat 
injured. The sixth had its tentacles still inflected and seemed 
much injured, and was apparently almost dead. 
Four of the central tentacles on the vigorous leaf, from which 
a piece had been cut off, after 24 hours, were now (i. e. on the 
third day after the drop had been given) examined. In most of 
the basal cells of three of these tentacles only a trace of aggre- 
gation was left, and many chlorophyll-grains eould be seen in 
them; but these were not so regular in shape or so regularly 
placed as are the normal grains ; so that I presume they were in 
the act of reforming. Two basal cells in one of these tentacles 
still eontained large quickly moving aggregated masses, and not 
a grain of chlorophyll could be distinguished in them. When 
this section was irrigated with the solution of iodine, the aggre- 
gated masses in the two just-mentioned cells instantly broke up 
