E283 4 
SEC TION-- Nil. 
All roots, few excepted, when left out 
of thé ground, yield by day and by 
might foul air, and infecl the fura 
rounding air. 
THE experiments I made upon 
this fubject convinced me that roots 
have this deleterious power, and 
fome even to fo great a degree, that 
it would not be fafe to remain in a 
{mall clofe room in which a great 
quantity of roots of plants are 
Kept. The roots of fome aquatic 
plants are remarkably apt to foul 
the air in which they are placed, 
fuch as roots of rufhes, though ever 
fo well cleaned from mud and dirt, 
and the roots of perficaria urens. 
But I found the roots of decabunza 
= E35 almoft 
