198 Sir Everard Home on the effect of heated iron , &c. 
some hours at that heat, does not form a complete coagulum ; 
but if drawn into a cup immersed in ice and left there, in 24 
hours I found the surface had a buffy coat -J of an inch thick ; 
and although 5 drams of serum had separated, the coagulum 
was so loose as hardly to hold together. 
