13 
suspension of the muscular motions of the vibrio tritici. 
observations, I feel great satisfaction in finding that I have 
nothing to add, nor any alterations to make, in my own in- 
vestigations and illustrations. 
EXPLANATION OF PLATES. 
Plate I. 
Fig. 1. A full grown diseased ear of white wheat, natural 
size. 
Fig. 2. A single spiketof an unripe diseased ear in a green 
state ; magnified 5 diameters. 
Fig. 3. An infected young germen from the upper part of 
the green spiket ; magnified 10 diameters. 
Fig. 4. Transverse section of the same, with one single 
large worm in its cavity, but no eggs, magnified 10 diameters. 
Fig. 5. An infected young germen from the lower part of 
the same green spiket; magnified 10 diameters. 
the same subject, in which he does not offer any new facts respecting these worms, 
except that he successfully inoculated them upon grains of rye and barley. In the 
7th volume of the Journal de Physique, published in 1776, page 369, Roffredi 
gives a third memoir on the subject, chiefly intended to clear up the confusion occa- 
sioned by many authors giving a different name to the same disease. 
In the 7th volume of the Journal de Physique, published in 1776, page 43, Felix 
Fontana gives a long letter on the subject of these worms ; but his chief object 
is, to establish two most erroneous ideas ; first, he maintains that the infected 
grains in which the worms are found, are extraneous tumors, or gall-nuts, the mere 
produce of the worms ; this, however, to every one who has seen one of the infected 
grains, must appear totally at variance with the fact. Secondly, that the suspen- 
sion of the muscular motions of these worms, which is extended to such extra- 
ordinary length of time, is not a state of torpor, but real death, and extinction of 
life ; that the worms really die as often as they get dry, and are again brought to 
real life, as often as they are moistened with water. 
