[ xxxviii J 
itfelf bas no power to mend air with- 
out the concurrence of plants, but on 
the contrary is apt to contaminate 
tte 
Thefe are fome of the fecret 
operations of plants I difcovered i in 
my retirement, of which 1 will en- 
deavour to give fome account in 
the following pages 5 fubmitting, | 
however, to the judgement of the 
candid reader the confequences, 
which I thought might fairly be 
deduced from the facts IT am to 
‘Felate. 
: - Pmuit not omit to acquail 
reader, that, in purfuing the: experi- 
ments related in this work, he will 
find that he labours i in vain, if he does 
not make ufe of pump-water frefh- 
ly drawn; for if this water has 
been expofed to the open air during 
fome time, it will have parted with 
<2 a great 
int the | 
EP OM hate ee 6 GS ae 
FS Ear PRES RN ee eee ie eerek © ere tak 
