[ 394 ] 
lent death, is not generally covered with a white 
cruft, notwithftanding it is fo late in being congealed, 
Thefe circumftances fhew, that fomething more 
than merely a leffened difpofition to coagulate is ne- 
ceftary for the forming of the cruft or fize. 3dly, 
The globules more readily fubfide in inflammatory 
cafes, from the furface of the whole mafs of blood, 
than they will afterwards do from the furface of a 
mixture with the ferum alone, of which the follow- 
ing experiments are a proof; but, before I relate them, 
let me obferve, that they were made with a view to 
difcover, whether that remarkable appearance, the 
inflammatory cruft, could be owing to any other 
caufe than to the coagulable lymph’s being attenuated, 
and having its difpofition to coagulation lefiened : 
and as the fame appearance might be fufpe&ed to 
arife from an increased fpecific gravity in the red par- 
ticles, or from the ferum alone being attenuated, I 
endeavoured to decide the queftion by the following 
experiments. 
Experiment XVII, 
Into a phial, marked A, I put an ounce of the 
ferum of the blood of a perfon, whofe crajfamentum 
had an inflammatory cruft. 
Into another, marked B, I poured an ounce of 
the ferum of a perfon whofe blood had no cruft ; 
then to each of thefe, I added a tea-fpoonful of 
ferum , loaded with the red particles of a perfon 
whofe blood had no inflammatory cruft or buff \ In 
attending to them, I could not obferve that the red 
particles fubfided at all, fooner in the ferum of the 
blood 
