[ 3 2 3 ] 
Since fo {mail an animal as this has thefe curious 
veficles equally as the larger and more perfect ani- 
mals, is it not probable that they are diffufed 
through the whole animal creation ? And what is 
found fo generally amongft animals muft be of great 
ufe in their ceconomy. 
P. S. 
Mr. Hewfon begs leave to add, that fince thefe 
experiments open a new field for enquiry ; and as he 
has already fo far proiecuted the fubjedt as to be per- 
fuaded that he has thereby difcovered not only the 
life of the lymphatic glands and of the Thymus, but 
alfo of the fpleen : in order to have the opinions 
of the ingenious concerning the fadls mentioned in 
this paper, he ventures to folicit, that fuch gentle- 
men as are curious in natural knowledge, and parti- 
cularly the Members of the Royal Society, would 
honour him with their company, at his houfe in 
Craven-flreet, in the Strand, where he will repeat 
the experiments before them. 
U & 
Vol. LXIII. 
XXXIV. Ac- 
