[ 41 J 
tracted from metals by vitriolic 
acid, : 
The property of plants is démon- 
{trated in experiments 41, 51, 56, 
57958, 59. 
SEC FLO Nooks 
All plants yield a more or le/s quantity 
of dephlogifticated air in. the day- 
time, when growing in the open 
air, and free from dark foade. 
*- ‘THE quantity of dephlogifti@ated 
air, and even the quality of it, which 
‘the leaves of plants give, fcems . 
‘to be different in different slants: 
_ though, indeed, this : may: depend 
fae an a great meaiure upon fome par- 
ticular 
