ISABEL MULFORD. 239 
assume to be spores. The walls are readily stained 
with aniline violet but the centre remains colorless. In 
a few instances, these cells were seen to germinate. 
When deprived of proper nourishment the species 
seems to have aresting state. Hard, dry, white scales 
are formed. These transferred to a freshly boiled 
potato grow with marvelous rapidity. Long filaments 
are formed so full of spores as to resemble strings of 
delicate transparent beads. A very common measure 
of cells is lu by 1.5-2y. 
Bacillus, species b. A culture of Bacterium incarna- 
tum, which behaved rather strangely, was kept under 
observation for several weeks. The zoogim@a had a 
brighter pink tint than most cultures of that species, 
and it was subjected to a very obvious but slow fermen- 
tation, which filled it with bubbles of gas, and gave off 
a strong odor of mulled corn. Microscopical examina- 
tion revealed nothing unusual in its cells. At one side 
of this culture was a dirty white mass with a botry- 
oidal surface, as seen with a Coddington lens. This 
was so close and tenacious in texture that I found 
it difficult to remove a part with my needle point for 
examination. In this tough, intercellular substance 
multitudes of bacilli were imbedded. <A fresh potato 
inoculated with this material was soon filled with a most 
Juxuriant growth. The whole substance of the potato 
was in a few days changed to a fermenting, transparent 
mass of semi-fluid consistency, and theroom was filled 
with the same strong odor as before. 
On the second day, cells were arranged in long fila- 
-ments, each article of which showed a partition at its 
center, marking the line of fission. On the third day 
the fission was complete, and chains of spherical cells, 
like rows of conidial spores in miniature, were seen. 
With these were mingled a few long rods. In a short 
time multitudes of oval spores were freed from these 
128 
