THE MICROBE OF PLEURO-PNEUMONIA. 
381 
These characteristics become rapidly more marked ; the swell¬ 
ing increases in all directions ; on July lo, it measures 25 centi¬ 
meters in diameter; is hard, tense and very painful, the animal 
strikes with its horn or feet at the hand that feels it. The out¬ 
lines of the swelling are well marked by a projecting border. 
The enlargement spreads rapidly forward, backward and 
downward; it reaches under the shoulder, which it pushes 
away from the trunk and almost renders it motionless ; it ex¬ 
tends under the abdomen as far as the udder ; and on July 16, 
it forms on the dewlap an oedematous tumor, warm, tense and 
painful, as big as the head. Little by little the arm and the fore¬ 
arm become engorged and the slightest pressure produces great 
pain, expressed by the animal with a dull and prolonged groan. 
The appetite, which has been good up to July 12, diminishes 
little by little; from the i8th the animal refuses all food. 
July 19, the animal is cast on an operating table ; after deep 
cauterization of the skin, a large quantity of pure limpid serosity, 
amber colored, is collected in sterilized glass tubes, where it 
flows so profusely as to moisten the cork of cotton ; after the op¬ 
eration, a stream of serosity runs from each puncture in great 
quantities. 
The following days, the animal remains stretched on her 
bed, unable to rise or even to stand up ; she dies during the 
night of the 23d to the 24th. 
At the post-mortem, an enormous oedematous infiltration is 
observed, occupying the entire right side and all the lower part 
of the body, from the maxillary space to the udder. At the 
dewlap, it forms a mass larger than the head of the animal; the 
right anterior leg is raised, pushed away from the trunk and in¬ 
filtrated in its whole length ; the arm and forearm are twice 
their size, notwithstanding the resistance of thek enveloping 
aponeuroses ; the cellular tissue is invaded as far as the bones. 
Every cut with the scalpel is followed by the running of a 
stream of serosity. The connective tissue looks gelatinous ; its 
meshes are distended with an enormous quantity of limpid, am¬ 
ber serosity. On a level with the shoulder and arm, the infil- 
