^70 Analyjis of the Air. 
broad mufflers, filled with 2,4, or more 
diaphragms of flannel or cloth dipped in 
afolution oi Sal Tartar^ or Tot-ap^ or Sea 
Salt and then dryed. 
The like mufflers might alfo be of fervice 
in many cafes where perfons may have urgent 
occafion to go for a fhort time into an in- 
fedious air: Which mufflers might, by an 
eafy contrivance, be fo made as to draw 
in breath thro’ the diaphragms^ and to 
breathe it out by another vent. 
In thefc and the like cafes this kind of 
mufflers may be very ferviceablcj but in 
the cafe of the damps of mines they are by 
no means tio be depended on, becaufe they 
are not a fufficient fcreen from fo very 
noxious vapours. 
Experiment CXVII. 
We have from the following Experiment 
a good hint, to make thefe Salts of fervice 
to us in fome other refpeds, ^c. 
I fet a lighted Candle under a large re- 
ceiver (Fig. 35.) which contained about 
4 gallons, it continued burning for 3 -j- J 
minutes, in which time it had abforbed about 
a 
