3 
of the component parts of the Blood . 
it ; there was also a small quantity of a transparent elastic 
mucus insoluble in water. The newly discovered globules 
were part of an inch in diameter, and their number in 
proportion of one to four of the large ones. The other layers, 
in proportion to the length of time coagulation had taken 
place, were become paler in colour, denser in texture, and 
what is most particularly deserving of notice in the present 
investigation, the proportion of the number of the small glo- 
bules to the large ones gradually increased, and in the layer 
longest coagulated, they were in the proportion of four to 
one. In this layer there was also the largest proportion of the 
transparent elastic mucus. 
The coat of the artery forming the pouch, appeared to be 
made up of zig-zag, or serpentine fibres, connected by the 
elastic mucus, in which many of the small globules were 
detected. 
The condensed cellular membrane on the outside of the 
pouch, consisted of thin membranes or films, easily separated, 
and between them were found many small globules. 
In the section of a large aneurismal tumor a deposit of 
crystals was met with. This uncommon appearance is repre- 
sented in the annexed drawings. These salts, in the absence 
of Professor Bran de, were analyzed by Mr. Faraday, Assis- 
tant in the Laboratory of the Royal Institution : they are sul- 
phate of lime with muriate and phosphate of soda ; salts 
usually met with in the blood, but probably never before 
seen in the form of crystals. 
The discovery of small globules in aneurismal coagula, 
and the increase of their number in proportion to the dura- 
