EXPOSUllK OF A HEIFER TO VARIOLA. 59 



pens and places where the diseased ones have lodged. Allow me to 

 observe, that much credit is due to you for the steps you have taken 

 in iuforniing the authorities of the introduction of this fatal malady, 

 and for the desire you evinced to investigate fully so important a 

 subject. 1 am, dear Sir, your's truly, 



"William Statham." 



The result of the experiment confirms tlie opinion 

 of the French veterinary surgeons, that ovine-pox 

 cannot be transmitted to the ox tribe by contagion or 

 infection ; as it will be seen by these communications, 

 that the placing of the heifer for three weeks with 

 variolous sheep was unattended with any injury to her 

 health, and that, after her removal, she continued well. 



Correct deductions can only be arrived at by 

 repeated observations and well-devised experiments ; 

 and although a second case of the same kind of inter- 

 course was also unattended with any ill consequences, 

 still our opinion is to be considered as qualified, when 

 we say that the small-pox of sheep will not spread to 

 oxen through the medium of contagion. 



We shall hereafter describe the results of the inocu- 

 lation of these animals with the lymph taken from the 

 vesicles of variola ovina. 



