n6 Mr. Schmeisser's Analysis of 
the atmosphere. While the water continues at rest, no bulli- 
tion of fixed air is perceived, and scarce any sulphureous smell. 
That this mineral water so easily parts with the hepatic air 
(perceivable on agitating it) if it be shaken in a warmer tem- 
perature, or transported from one place to another, is probably 
owing to the fixed air which it contains : for as this aerial acid 
has a great affinity to phlogiston ; so it may hence be inferred, 
that fixed and hepatic air cannot exist together in a mineral 
water, but that the latter will be destroyed, as the fixed air is 
developed by gentle warmth. 
Chemical Experiments. Examination of the Kilburn Waters 
by reagent Substances. 
EXPERIMENT I. 
The tincture of litmus is a very little affected by the water 
fresh from the spring, and not at all after having been boiled ; 
which proves that this water contains very little aerial acid. 
EXPERIMENT II. 
Paper stained with a decoction of logwood is somewhat 
changed, to rather a bluish hue, by fresh water ; from this I 
infer, that the water contains a little absorbent earth dissolved 
in aerial acid. 
EXPERIMENT III. 
Paper stained with turmeric is not changed by this water ; 
which would happen if it contained any uncombined alkaline 
salt. 
