Jg OBSERVATIONS AND EXPERIMENTS ON PUS. 



3. After 12 hours repose, about two ounces by measure 

 of a limpid fluid having appeared on the top, it wasde- 

 canted from off the opaque purulent fluid; which was be- 

 come thinner in tfie upper part of the vessel containing it, 

 and thicker in the lower tha,n before, 



4. On farther repose, it did not become offensive so soon 

 as a portion of the same pus mixed with a little blood, or 

 as serum alone. 



5. This p-js neither indicated aciditj' nor alkalescency to 

 the usual tests, viz. turnsole paper, tincture of red cabbage, 

 Brazil-wood paper, and turmeric paj?er. 1 have, in other 

 instatices, sometimes observed acidity to be indicated by 

 turnsole paper; but in none alkalescency, so long as the 

 matter remained without fcetor. 



' 6. Beiriig examined under the microscope, when duly 

 diluted with distilled water, innumerable spherical particles 

 were seen, which did not appear altered in figure, or dimi- 

 nished in number, by extreme dilution ; that is, they did 

 not appear to [vavc been dissolved. 



ottheCdkind, II. A puit of pus of the second kind, viz. curdy, was 

 afforded by a psoas abscess. 



The colour was brown. It felt knotty. On pouring 

 from one vessel to another, the curdy masses were maaifest, 

 and of various sizes, from that of a pin's head to a hazel 

 nut. It was more viicid than the former, and of a li'ttle 

 greater specific gravity. On standing, a limpid fluid ap- 

 peared upon the top, as in the first kind, but in smaller 

 quantity. Globules were seen with the microscope, but 

 also a number of irregularly figured larger masses. Pu- 

 trefaction took place sooner than in the former kind. In 

 other properties, this pus was similar to the first kind. 



oftheS-Jkird, - HI. Serous thin pus. It was produced by a fatal inflam- 

 mation of the peritoneal coat, without ulcer, and taken out 

 of the cavity of the abdomen. A good deal of serum was 

 also effused, of which the pus was a deposit. It was not 

 much thicker than milk. To the feeling it was not at all 

 unctuous. The smell was slightly offensive. On standing 

 Q4 hours a sediment appeared, occupying only one half tlie 

 full vessel, under a wheylike liquid. Putrefaction took 

 place sooner than in either of the tvvo former kinds. The 

 - i.-t-" .^. « >- specific 



