[ 99 ] 
infufion, the lime water remained unaltered in its 
alkaline properties. And though I then conceived 
the redu&ion of the quick-lime to arife from the at- 
traction of fixable air, yet it was by no means with 
that clearnefs and certainty, which arife from Mr. 
M c Bride’s experiments. This experiment was repeat- 
ed feveral times, with the fame event. 
* 
Experiment X. 
Lime water being poured to a watery infufion of 
the bark, gave it a high colour, and they remained 
pellucid ; they tinged violet, green ; and were diftindly 
alcaline and bitter. Thefe things were obfervable for 
fome hours after the mixing them. 
Ob. This experiment feems to fiievv, that the air of 
the bark in fubftance, which reduces the quick-lime, 
does not enter into the infufion, or elfe adheres to it fo 
firmly, that it cannot be fimilarly attraded by the 
quick-lime. 
Experiment XI. 
A cold infufion in common water produced no 
change on the fyrup of violets. 
Ob. I have fomewhere feen it aflerted, that the 
infufion turned violet, green ; from whence an alkaline 
quality was inferred ; to examine the truth of which, 
this experiment was made. 
Experiment XII. 
Half an ounce of powdered Peruvian bark was 
infufed for 24 hours, in fix ounces of a folution of fal 
ammoniac ; when the menftruum had received a 
flight colour, but flill remained clear and faline as 
before. 
O 2 Expe- 
