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Experiment V. 
The diftilled water faturated with fixed air neither 
effervefced, norfhewed any clouds, when mixed with 
the fixed or. volatile alkali. 
Experiment VI. 
No curd was formed by pouring this water upon 
an equal quantity -of milk, and boiling them toge- 
ther. 
Experiment VII. 
When agitated with foap, this water produced 
curds, and lathered with fome difficulty ; but not fo 
much as the diftilled water mixed with vitriolic acid 
in the very fmall proportion above-mentioned. The 
Erne diftilled water without any impregnation of 
fixed air lathered with foap without the leaf! previous 
curdling. River water, and a pleafant pump water 
not remarkably hard, were compared with thefe. 
The former produced curds before it lathered, but 
not quite in fo great a quantity as the diftilled water 
impregnated with fixed air : the latter caufed a 
ftronger curd than any of the others above-men- < 
tioned. 
Experiment VIII. 
Apprehending that the fixed air in the diftilled 
water occaftoned the coagulation, or feparation of 
the oily part of the foap, only by deftroying the 
caufticity of the lixivium , and thereby rendering the 
Kk 4 union 
