656 SELECT COMMITTEE ON CONTAGIOUS DISEASES BILL. 
I 
affect him. The materies m-orbi have first a local effect, and 
then the system becomes ultimately contaminated. 
125. Do you think that regulations such as you have 
alluded to are more calculated to stop the spread of con- 
tagious diseases than of infectious diseases ?- — Unquestionably. 
126. And regulations that might be necessary and very 
efficient in the case of glanders, and such-like diseases, would 
not be so necessary with regard to pleuro-pneumonia and 
other diseases simply infectious? — Just so ; but I think it 
would be easy so to word a clause as to meet these differences. 
127. Mr . Miles . — At what stage of the disease do you 
think pleuro-pneumonia becomes infectious ? — I think as 
soon as it declares itself, as soon as it can be satisfactorily 
ascertained that the animal has the disease. This agrees with 
every other contagious disease affecting animals. Such 
diseases as are incubated in the system of an animal, the 
animal has no power of extending during the period of 
incubation; but as soon as the disease declares itself, then 
it takes on either its contagious or infectious property, or both. 
128. Supposing you had twenty animals tied up, and one 
is affected merely by what is called the incipient state, that 
animal is taken away, and slaughtered ; but if it has been 
with other animals for two or three days, would the other 
animals be infected by the presence of that animal for those 
two or three days ? — Not necessarily so; the probability is, 
that all would escape. It is just possible that one or two 
might take the disease ; that would depend entirely on the 
degree of susceptibility that existed among the animals at 
the time they were living with the diseased. 
129. Your opinion is, that from the very first moment the 
disease attacks the animal, it is contagious ? — I believe it is so. 
130. I will now take you to the other disease, the sheep- 
pox. Will you describe the symptoms, and say whether you 
conceive it infectious or contagious ? — Small-pox, as a disease 
attacking animals, seems exclusively to belong to sheep. It 
is an affection which is highly contagious, and also infectious ; 
it is incubated in the system of an animal for a period of 
time varying from seven to twelve days, during which the 
animal gives not the slightest evidence of being affected 
with any malady : when the disease shows itself, the animal 
has some constitutional disturbance, which leads to an altera- 
tion of the character of the pulse, and it is also accompanied 
with loss of appetite and of rumination ; but the princi- 
pal changes show themselves upon the skin. We find, in 
the first instance, there is efflorescence, a redness of the skin 
in certain places, more particularly where it is void of wool. 
