3 
suspension of the muscular motions of the vibrio tritici. 
vegetation of the growing plant of wheat ; and believing that 
the eggs of these worms must be conveyed into the cavities 
of the very young germens of the flowers of wheat by the 
circulating sap, in the same manner as the seed of the para- 
sitical fungi which occasion the well-known disease in wheat, 
the smut-balls, and which I had, in former experiments, suc- 
cessfully inoculated upon sound wheat, I determined to try 
the same experiment with these worms. I therefore selected 
some sound grains of wheat, and placed some portions of the 
mass of worms in the grooves on the posterior sides of the 
grains, and planted them in the ground in the month of Oc- 
tober, 1807. Nearly all the seeds came soon up, and I took 
from time to time some of the young plants for examination, 
but could not perceive any effect of the inoculation, till the 
month of March, 1808, when, in carefully slitting open the 
short stalk of a young plant, I found three or four worms 
within it ; they were in every respect the same, but they 
were now about two-thirds larger, as well in length as in 
diameter. 
On the 5th of June I found, for the first time, some of the 
worms, of different sizes, within the cavities of the young 
germens ; and having, in the beginning of March, found some 
of them in an enlarged state in the stalk, I concluded that 
some of the original worms, with which I had inoculated the 
grains of seed, had got, during the germination of the grains, 
into the stalk, where they became mature, and laid their 
numerous eggs, some of which must be carried by the 
circulating sap into the cavities of the then forming young 
germens, in which the young worms extricate themselves 
from these eggs ; and finding their proper nourishment 
