( FI 
Spinion of the utmoft confequehce, 
and throws a great deal of light 
upon the nature of nitrous air, and 
upon its wonderful property of de- 
ftroying refpicable air; and it il- 
luftrates his ingenious theory of this 
quality, which, [Thope, the author 
will foon publifh, but which I have 
no right either to claim or to an- 
ticipate. 
In confequence of this obferva+ 
tion we need not be fo anxious 
about the goodnefs of the hitrous 
acid, nor abouit the ftreng 
nitrous air. 
We have now already examined 
eighteen different heads, from which 
errors or differences in this import- 
ant. €xperiment may arife, which 
may render the whole refult of the 
teit fallacious and entirely uncertain. 
. N Z aie 
* 
