RE a Se ieee eae ae 
Lactpae 
I found the bulk of air increafed 
to about .. One meafure of it 
with one of nitrous air Bemapied 
1.90. 
105. Two onriceamediires of 
inflammable air was alfo let up in 
a fimilar jar with one handful “of 
Perficaria urens or water-pepper $ 
next day I found the bulk of the 
air diminifhed about + - One mea 
pe at with one of nitrous air 
ccoupied- tT. 07+ iJ Bags oe woe ie at 
LN. B. All thefe three fais ftood 
in the houfe from the evening till 
‘between twelve and one next day, 
‘fo that the light of the day may 
have extricated fome air from the 
pepper-mint and the walnut-leaves. 
‘As neither of thefe plants could 
“be faid to have really corrected this 
~poifonous air, I was curious to fee 
