5 
of the component parts of the Blood. 
and the lower portion principally of red globules ; so that the 
buffy appearance occurs when the lymph is so unusually slow 
in coagulating, that the red globules, which are so much 
larger and heavier, sink before that process has taken place. 
In the absence of Professor Brande, Mr. Faraday analyzed 
a portion of the buff, and of the part made up of red globules : 
having previously washed away the colouring matter, their 
chemical properties were in all respects the same. 
That I might compare the structure of tumors, with that of 
the layers in aneurismal coagula, I got Mr. Bauer to examine 
in the microscope the structure of a tumor in the prostate 
gland, made up of rounded nodules ; the last formed of 
these was produced by the bursting of a small artery in the 
substance of the gland, so short a time before death, that 
the rupture of the vessel was distinctly seen when the parts 
were examined. He found the texture of the tumor soft and 
spongy ; it was made up almost wholly of red globules free 
from colour, very few of those of lymph, and some of the 
transparent elastic jelly ; the bands by which the nodules were 
separated, were composed of three-fourths of lymph, one- 
fourth of red globules from which the colour had been dis- 
charged, and a considerable proportion of the transparent 
jelly. 
A tumor in the breast of long standing, of which the first 
formed part was hard and colourless, the last less compact 
and full of vessels or tubes, is shown in the annexed draw- 
ings. When its structure was examined in the microscope, the 
hard part was made up almost wholly of lymph globules, and 
elastic jelly ; the last made one*fourth of the whole. The 
