50 British Association for the Advancement of Science. 
every vessel, arteries as well as veins of the body, every tissue 
was literally injected with black blood, which freely followed the 
knife on dissecting. Dr. Mackintosh now presented a great num- 
ber of preparations, and paintings, and drawings, of the organs of 
the body afflicted with cholera. Many preparations were dried 
with the cholera blood in them, which was effected by submit- 
ting them, immediately on their removal from the body, to a 
stream of dry hot air, from apparatus constructed for that purpose. 
These accumulations were greater in some organs than others, 
often depending on the state of the patient’s health previous to 
the attack,—if he had bronchitis, there would be the greatest ac- 
eumulation. The bloodvessels were greatly distended: in a 
cast of a case taken from the abdomen, which he exhibited, the 
abdominal aorta was one inch in diameter, vena cava three-fifths, 
emulgent vein eight-sixteenths. ‘The general anatomical char- 
acters, as shown by preparations of each organ, were accumula- 
tions of blood, ecchymosis, called by the French apoplexy ; thus, 
if occurring in the lungs,—pulmonary apoplexy, petechie, and 
clots. In addition, we may mention some peculiarities in indi- 
vidual organs, as noticed by the lecturer. In the head, even the 
bones were vascular, and could not be bleached, but with great 
difficulty : arachnitis rare, pia mater loaded with blood and effu- . 
sion, which caused many to mistake it for arachnitis; in the 
sinuses clots of blood and lymph, rendering in these cases recov- 
ery impossible. In the spinal marrow were, in sixty out of two 
hundred, deposits of bone on the theca; in the chest, pleura at 
first dry, as if exposed to dry air ; in collapse it became unctuous ; 
lungs very heavy, weighing 3 lb. 9 0z., to 3 Ib. 11 0z.; pulmo- 
nary apoplexy frequent in consecutive fever, which fully explains 
the number of deaths from that fever after the cholera attack. In 
the abdomen, the mucous membrane ulcerated and softened, not 
always red, sometimes even white; the liver resembled that of 
dram-drinkers, the gall-bladder unusually distended with black 
bile ; then many galls in numerous cases, in only one was the 
least rendered impervious by them; the kidneys were diseased, 
_ as recorded by Bright, and from the papilla: could be pressed 
mucus; bladder contracted. As to the blood vessels, he wished 
to direct the particular attention of the Section to them; he 
aw, by many preparations, the diseased state of their 
, the o of which was smugly sii oo 
