INOCULATION FOR PLEURO-PNEUMONIA IN CATTLE. 473 
Commissioners, “ that M. Willems declared to the veterinary 
surgeon , M. Vaes , that this beast was successfully operated on 
by the same English veterinary professor who inoculated the one 
which was killed in consequence of Pleuro-pneumonia on 
December 2d, and with virus taken from the tail of another 
beast.” 
“Dr. Willems explains how it was that these animals 
were not protected. c Two beasts,’ says he, ‘ inoculated, as 
an experiment , with pus (not lymph # ) taken from an incision 
made in the tail of an animal previously inoculated, in the 
presence of Professors Simonds and Morton, who made a 
note of it, have contracted the disease ; they were placed 
among the other cattle in the stable. Two days after the 
insertion of the virulent matter the small wounds were suppu- 
rating.’ 
“We here insert the declaration of M. Willems’ father, 
which we refrained from inserting in the minutes of the 
Hasselt Commission at p. 145. This distiller informs us, 
and begs us to make mention of it in the present Report , that 
some cases of failure w r hich the delegates of our Commission 
have been enabled to prove in two animals coming from his 
stables, furnish him with a new proof of the system of 
inoculation adopted by his son. ‘ These two beasts/ says M. 
Willems, ‘ were operated on by the Professor of the Royal 
Veterinary College of London, with matter resembling pus , 
taken from another inoculated beast , which he considered improper. 
The phenomena of inoculation succeeded quickly upon the 
operation, and went through the various stages in eight 
days.’ ” 
The Commissioners further observe that, “ in our sincere 
desire to arrive without prejudice at the discovery of the 
truth, we have contented ourselves with the simple statement 
of facts, refraining entirely from discussing them. We have 
said, at the beginning of this report, that all the uncertain 
cases have been passed by in silence , or have been presented with a 
character of doubt attached to them. We also give M. Willems 
full credit — 1, for reporting, even to the minutest circum- 
stance, all facts which have appeared favorable to inocula- 
tion ; 2, for placing, under the head of ‘ Faits contestes / every- 
thing which the physician of Hasselt assumes has resulted 
from an improper operation, and also the two cases width 
* It may be necessary to explain that the term lymph is used by the medical 
profession to express the specific contents of a vesicle, such as that produced in 
vaccination. It is held by many to be synonymous with virus , and is employed 
in that sense in this place by Dr. Willems, who, however, speaks almost in- 
variably of the “ special virus ” of pleuro-pneumonia. 
XXVI. 62 
