262 
Ex^periments on 
t Monthly Microscopical 
Journal, Nov. 1, 1869. 
angles to the larger or parent cell. The average length of the 
single cells was about ^TFiJo th of an inch long. How these cells had 
become imbedded so evenly in this film, or how they came there at 
all, at the bottom of the infusion, I cannot imagine: I do not 
believe in their having come from the atmosphere. The surface 
pellicle at this time was swarming with the so-called haderia and 
vibrios, in different stages of development. 
From this up to the fourteenth day I observed no particular 
change, but now the vibriones had become much elongated, similar 
to those figured by Dr. Hughes Bennett, in ' Popular Science 
Eeview,' page 53, Fig. 2. 
The beef infusion had at this time developed plenty of bacteria 
and vibriones, and three large patches of Fenicillium erustaceum, 
which occupied nearly all the surface of the fluid, but no other 
plants were observed in it. This plant did not make its appearance 
at all in either of the other vessels. 
Fifteenth day the pellicle of the fiver showed several dense 
patches of cells, varying very much in size, and of various forms, 
the smaller ones being generally spherical, and the larger ones 
more or less angular, the larger being filled with cellules in various 
stages of development. This was almost the first bright or sunny 
morning since the commencement of the investigations, and the 
vibriones were exceedingly active, moving about in various direc- 
tions, and gyrating, reminding one very much of the gambols of 
Gyrinus natator. 
Sixteenth day I observed imbedded in some flocculent matter of 
the liver, suspended near the bottom of the vessel, some curious cells, 
very much like the nucleous bodies found in the sarcode of Gromia, 
as figured by Schultze and Carpenter. The large cells were filled 
with a molecular mass, in various stages of development into cellules. 
In the large pedunculated cells it will be seen that the molecules 
have arranged themselves somewhat into fines, particularly towards 
the peduncle, and gradually developing upwards into cellules ; 
the lines of demarcation could be just discovered (Fig. 9). In the 
spherical ceU these lines were rendered more distinct, the cell 
having apparently reached a higher state of development. The 
development of cell structure from the molecular mass was seen to 
great advantage in these large cells, better perhaps than from the 
larger masses of molecular matter. We first observe the enclosed 
molecules are being acted on by some force or forces as they begin 
to arrange themselves into various groups, drawn together into 
centres, and consequently the lines between these centres are ren- 
dered clear and transparent, and from these it would appear that 
the protoplasmic film grows, and envelops the nucleus of mole- 
cules. In a short time the molecular mass in these enclosed cells 
also begins to divide in a similar manner. So the development goes 
