284 RHEUM. 
Plants, filling up moft of the vacant Places 
in the Drop as the Picture fhews. This 
Salt has but one Sort of regular Cryftals, 
which is hexagonal, and appears as at e. 
C H A P. L. 
RHEUM . 
W HEN People get what they call a 
running Cold, it is not unufual for a 
thin clear Humour to be difcharged through 
the Noftrils, in fo confiderable Quantity as 
to wet feveral Handkerchiefs, and even to 
fall from the Nofe in Drops, if not pre¬ 
vented by frequently wiping it away. This 
Humour is what I mean by Rheum . 
Being myfelf very fubjedt to this Diforder, 
which is commonly preceded by a Sen fa¬ 
t-ion of Fulnefs and Rigidity in the Mufcles 
of the Head and Face, and attended with 
much Heat, Rednefs and Sorenefs of the 
Noftrils and Partis immediately adjoining, du¬ 
ring the Difcharge, (which continues com¬ 
monly three Days, at the End whereof it be¬ 
gins to thicken and become lefs acrid:) I was 
defirous to know whence this limpid Hu¬ 
mour could produce fo much Irritation and 
Uneafinefs ; and as a very little Confideration 
made me fuppofe it mult be owing to.its-be¬ 
ing loaded with pungent Salts of fome fort 
9 °r 
