[ ] 
other fluids, particularly poifonous ones, 
injeded into the blood-veffels, or carried 
into them by. the lymphatics, no fooner 
touch the heart or even the arteries, than 
they contract with fuch violence as to put 
a ftop to all circulation, and fo produce 
death. 
The prefence of a ftone in the bladder 
render this organ very impatient, and 
throws it into frequent and inconvenient 
exertion. 
. 3d, Miafmata—Miafmata have not an 
immediate adion upon the parts, whofe 
fundions they derange, and on this ac¬ 
count it is, that I believe them to confti- 
tute a caufe apart, and diftind from thofe 
juft mentioned. 
As foon as a miafma is introduced into 
the mafs of blood, a variety of fymptoms 
prefent themfelves, the moft common of 
which is an increafed adion of the heart. 
Vomiting is likewife Yery frequent. Some¬ 
times 
