and Experiments on Pus. 301 
a much smaller quantity of residue was obtained than before, 
viz. one sixtieth from the serous pus, and one seventieth from 
the others ; and it consisted of the same kind of substances as 
above described ; but the muriate of soda and potash were in 
smaller proportion than before. 
(i?) A fourth time distilled water in the quantity of a pint, 
was mixed with the present four parcels of pus, and after 
standing 48 hours, three fourths of a pint of clear colourless 
liquid was poured off from each of them. It became slightly 
turbid and whitish on boiling. On evaporation, each parcel 
afforded about of the fluid employed. The residues now 
consisted of animal matter, with a much smaller proportion 
than before, of muriate of soda, phosphate of lime, and 
potash — nothing else could now be traced. 
(/) Distilled water in the quantity of a pint, was once more 
mixed with the four sorts of purulent matter undergoing 
inquiry. After 48 hours, a pint of liquid was decanted from 
off each of them ; but being slightly turbid, they were left to 
stand 24 hours. By this time a sediment was deposited from 
each of the liquors ; but being still, though very slightly, 
turbid, they were filtrated through suitable paper. They were 
then transparent. The transparent filtrated liquors had their 
transparency disturbed by a boiling temperature. They 
became also slightly milky, with nitrate of silver, but scarcely 
so with infusion of gall nut. On evaporation to the quantity 
of an ounce from each pint, the residuary liquids appeared 
slightly globular. These, on evaporation to dryness, yielded 
not more than one part of animal matter, from each 500 of 
the transparent filtrated liquids. 
(g) On standing three or four days in a cold room, the 
mdcccXo R r 
