BLOOD. 



295 



taiued bv the second venesection contains a considerably smaller 

 mean amount of fibrin than the blood previously taken. The 

 albumen and corpuscles are likewise diminished. 



The case in which venesection was performed three times 

 offered no peculiarity ; neither did the analyses of the blood of 

 the two women. 



In all these analyses the clot was found to present no strik- 

 ing pecidiai'ity. There was none of the softness and diflluence 

 on w^hich the older writers laid so much stress. 



Scherer has analysed the salts of the blood in a case of 

 typhoid fever. In 1000 parts of blood tliei'e were 176-3 of 

 sohd residue^ which on incineration yielded 11 '92 of fixed salts. 

 These consisted of: 



j3. Febris continua. 



1. Prodromi febris conthiucB. The blood exhibits similar 

 changes in the progress of continued fever^ as in typhus. 

 Andral and Gavarret have carefully analysed the blood in this 

 disease, and give the following account of their researches. 



They made nine analyses of the blood of six persons. The 

 fibrin did not exceed the normal amount in any instance, (in 

 one, however, it amounted to 3*2) ; in three cases it w^as a little 

 below the standard, but exceeded 2 ; in two cases it was rather 

 less than 2; and in one case as low as 1-6. The amount of 

 blood-corpuscles was lower in only two cases than in normal 

 blood; in the others it was more or less increased, and in the 

 blood in which the fibrin amounted to only 1*6, the corpuscles 

 amounted to 157*7, which, if the fibrin were estimated at 3, 

 would give the enormous amount of 296. We have only one 

 instance in typhoid blood of so high a proportion. The amount 

 of the residue of the senim is increased, rather than diminished, 

 and the same is the case with the solid constituents of the 

 blood generally. 



