THE 
VETERINARIAN. 
EIL SEPTEMBER, 1880. 
Fourth Series, 
No. 309. 
Communications and Cases: 
VACCINE AND CALF VACCINATION. 
As the obtainment of primary vaccine lymph from the cow 
has now become a great desideratum, in consequence of the steps 
which have been taken by the Government with reference to 
so-called animal vaccination, we deem it important that any 
efforts which are made in this direction should, whether 
successful or not, be recorded in our pages. For this pur¬ 
pose we give insertion to the following particulars relating 
to a supposed outbreak of natural vaccinia and the experi¬ 
ments which were had recourse to to determine the nature 
of the eruption. 
In the last week of June we were informed by Mr. 
Wallis, a student at the Royal Veterinary College, that 
his father, an eminent veterinary surgeon, residing at 
Halstead, Essex, whom we knew to have had considerable 
experience in ovine variola , had just been called to some 
cases of vaccinia . With a view to obtain lymph for experi¬ 
mental purposes, we at once forwarded some points to Mr. 
Wallis, with a request that he would carefully and abundantly 
charge them with lymph from the vesicles in their earliest 
but well-developed stage. The request was kindly and 
promptly complied with. 
The history of the outbreak is thus given by Mr. Wallis: 
Halstead, August Qth, 1880. 
Dear Prof. Simonds.—I most cheerfully comply with 
your request to furnish data and some particulars with regard 
to the supposed cases of natural cow-pox which, within the 
LIII. 41 
