154 
RESPIRATION AND NUTRITION. 
Relative to the Colouration of the Venous Blood . 
1. It is black in the case in which the fibrine diminishes, 
because the tissues are still able to absorb the oxygen which 
the globules have acquired in their passage through the lungs. 
2. It is arterial red when the fibrine augments, because, 
then, the organic tissues, dead or dying, are no longer able to 
absorb oxygen as before. 
( Recueil de Med. Vet . de Juillet , 1852.) 
RESEARCHES ON THE ALTERATIONS WHICH PAIN, LONG 
TIME ENDURED, MAY OCCASION IN THE COMPOSITION 
OF THE BLOOD, INTENDED TO SERVE IN AID OF EX- 
PLAINING RESPIRATION AND NUTRITION. 
By M. Clement, Chef-de-Service of Chemistry at Alfort. 
Without entering on any of the large details, or the direct 
conclusions deducible from the preceding reflections, as well 
as from the inspection of the Tables accompanying them, it 
appears that, during violent pain — 
1st. The water and colouring matter of the blood augment, 
or seem to augment, in quantity. 
2dly. The albumen and fibrine diminish. 
Sdly. That, while the fibrine and albumen, ip unison, are 
diminishing 7-1000ths on an average on the one part, the 
colouring matters of the blood are increasing about 7-lOOOths 
on the other side. 
4thly. That these facts, studied in relation to the influence 
of pain on the organism, show that severe pain, by the sure 
excitation of the organic functions it produces, must be ' 
expected to speedily and deeply wear the economy, so that 
this last, in order to sustain itself, has need to react strongly 
on the elements of the blood. 
5thly. That the blood in this case loses part of its fibrine 
and part of its albumen, without losing any of its globules. 
6thly. That in relation to the study of nutrition and 
respiration, it would seem to result from these facts, and 
especially when we come to compare the chemical compo- 
sition of the blood with that of the soft tissues, in particular 
the muscles; #, the fibrine is to serve exclusively for nu- 
trition ; b, and that albumen which would appear to escape 
