ey 
51 
The second case was that of Campanula rapunculoides, 
the latex of which being milky, is better suited for observa- 
tion. In the hair of this plant was shewn the same reticu- 
lated connection of the currents of latex as is observable in 
the interior of the plant, whether near the focus of cyclosis 
or in the cellular tissue. This circulation of a milky fluid 
was in all respects the same as that observed in Commelina, 
Tradescantia, and other plants whose latex is not milky. 
Thus all these acts of circulation take place in a system of 
vessels in the form of a very fine network surrounding the 
cells, and even traversing their interior in various directions; 
and this allows us at once to distinguish cyclosis from the 
rotation of homorganic plants. The former is never isolated 
in a cell, but always forms a part of a reticulated system be- 
longing to several cells. is ; 
With regard to anastomoses in the laticiferous tissue, M. 
Schultz referred to his numerous drawings for abundant 
proof of their universal existence where cyclosis occurs. The 
knowledge of this plexus throws great light upon the direc- 
tion of thecurrents of cyclosis in the interior of the parenchyma 
of living plants, where the sides of the vessels cannot be 
distinguished any more than in animals, in which doubts 
have been often entertained as to the existence of vessels in 
the system of the surface. It may be as impossible in plants 
as in animals to separate the vessels in every part, but there 
is no reason why we should not take a part for the whole in 
the one case as well as the other. 
In conclusion, the author expressed his belief that a 
general law in the organization of plants, as in animals, con- 
stitutes two great divisions in the vegetable kingdom—the 
homorganic and the heterorganic—and that it is chiefly from 
variations in the system of circulation that those internal 
changes of organization takes place, the results of which are 
the different grades of developement in the natural divisions 
of the vegetable kingdom ; while in the animal kingdom it 
is principally on the nervous system that the general types 
of natural divisions are founded. 
G. July, 1839. 
