Royal Veterinary College. 
125 
inch. Cardiac muscle abnormally pale ; surface of heart shows a 
spot of commencing pericarditis. Posterior fourth of left lung in a 
condition of dense croupous consolidation. Abdominal organs nor- 
mal. Cover-glass preparations showed immense numbers of the 
short bacteria in the hepatised lung, and about one bacterium 
for every three or four red corpuscles in blood from the heart. The 
bacteria were also fairly numerous in a cover-glass preparation made 
from the surface of the heart. 
Experiment II . — Inoculated a full-grown turkey-cock with an 
agar culture of the bacterium (third generation from the turkey of 
Experiment I.). The growth on the surface of the agar was sus- 
pended in sterilised bouillon, about twenty drops of which were 
injected with a sterilised syringe underneath the skin of the neck. 
On the following day the turkey was obviously ill — refused food, 
purging, wattles livid, feathers ruffled. On the second day it was 
much worse, respiration 
partly oral, frequent open- 
ing and closing of the 
beak. It was found dead 
fifty-three hours after in- 
oculation. 
Post-mortem. — Car- 
cass very well nourished, 
fat abundant. No swell- 
ing at seat of inoculation. 
Abdominal organs appear 
normal. No obvious peri- 
carditis. Blood in heart 
firmly clotted. Right 
lung almost entirely hepa- 
tised, the lesion exactly 
repeating that present in 
the spontaneous cases. 
Hepatised lung appears 
much swollen, dark in 
colour, and firm on sec- Fra. 4 
tion, with a slightly mot- 
tled cut surface. As regards its swollen appearance and its con- 
sistence, the hepatised lung recalls the solidification of bovine pleuro- 
pneumonia. Cover-glass preparations showed that the short bacteria 
were enormously abundant in the hepatised lung, and cultures made 
from the lung on agar yielded numerous colonies of the same bacteria, 
with one or two colonies from other organisms apparently acci- 
dentally present. 
Three other experiments with turkeys, the details of which need 
not be given here, had a like result, the turkey in each case dying 
within seventy-two hours after infection, and exhibiting at the post- 
mortem a pneumonia identical with that present in the turkeys 
which had contracted the disease naturally. Moreover, in each 
case the same short bacterium was present in immense numbers in 
