Acidity, DecGmpoJttion of Water, and Phlogiflon. 321 
ther, the quantities being fmall, and fubmit them to further 
examination. 
§ nr. 
Exp. I. The united liquids being neutralized by the addi- 
tion of cauflic vegetable alkali , a beautiful green 
precipitate fubfided. 
2. This precipitate diflolved entirely in cauftic volatile 
alkali, changing to a beautiful blue. 
< 3. The iuper-natant liquid being (lowly evaporated to 
drynefs, the liquor that efcaped during this procefs • 
was nothing but pure water. 
4. The imperfectly cryftallized refiduum (3) effer- 
vefced upon the addition of concentrated vitriolic 
acid, and being fubmitted to diftillation, on the fir ft 
application of heat, an orange- coloured vapour arofe, 
which was condenfed in a receiver previoufly wetted 
with pure water. 
5. The diftilled liquor (4) had the fmell and the tafte 
of nitrous acid , which inftantly changed the blue of 
litmus, and that of violet paper to a red; and it 
aCted upon filver. 
6. Terra ponder oJa lime water , added to it, occaficned 
no precipitation. 
7. Saturated with vegetable alkali it converted cap 
paper into touch paper, and formed, upon a (low eva- 
poration, cryftals fimilar to thofe of nitre. 
§ iv. 
Jan. 21, 1788. Liquor produced by burning inflammable air, 
obtained as before, and dephlogiflicated air from mercurius p re- 
ap. ruber , in a clofe tinned iron veflel. 
This - 
