£ 5^8 ] 
LXiX. A Difcourfe on the Ufefulnefs of In - 
oculatio7i of the homed Cattle to prevent 
the contagious Diftemper among them. In 
a Letter to the Right Hon. George Lari 
of Macclesfield, P. R. S . fro?n Daniel 
Peter Layard, M. D. F.R. S. 
cx 
<c 
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My Lord, 
Read Feb. 2. f g \ pq £ honour you have done me, in 
I/S8 ’ JL condefcending to perufe my Eftay 
on the contagious Diftemper among the horned 
Cattle, claims my mofb refpedtful thanks ; and I am 
no lefs obliged to your Lordfhip for the juft remark 
you made, “ That before inoculation could be prac- 
“ tifed on the horned Cattle, it is neceftary to bring 
proofs, that this difeafe is not fufceptible more 
than once ; and alfo affurances, that a recovery 
from the diftemper by inoculation guards the beaft 
“ from a fecond infection.” 
An intire convidtion of the analogy between this 
difeafe and the fmall-pox would not permit me to 
omit mentioning the great advantages, which muft 
arife from inoculation ; and therefore, mv Lord, I 
recommend its ufe : nor do I find any real'on to alter 
my opinion, after having carefully read over what 
has been publifhed, and made the ftridleft inquiry I 
was able in feveral parts of Great Britain. 
I fhall, in the concifeft manner poffible, fubmit 
the following particulars to your Lordfhip’s conlide- 
ration, and the learned Society, over which you fo 
defervedly prefide. 
The 
