350 Dr. Thomson's Chemical Analysis 



2. The serum slightly red. 



Serum 32 



Crassameiitum 68 



100 



3. Serum very red. 



Serum 38-42 



Crassamentum 61 '58 



100-00 



4. Serum very red. 



Serum 35-66 



Crassamentum 64-34 



100-00 ' 



5. Serum a very deep red. 



Serum . 27*59 



Crassamentum ..... 72-41 



100-00 

 The mean of these five gives the ratio between the serum and 

 crassamentum in cholera blood as follows : 



Serum 33-2 



Crassamentum 66-8 



100-0 

 If in healthy blood we suppose the serum to amount to 33*2, 

 the crassamentum will be only 27-16 : thus it appears that in 

 cholera blood the crassamentum is more than twice as much 

 as in healthy blood. 



III. Of the Composition of Cholera Serum. 

 It is well known that the serum of blood has the property 

 of rendering cudbear paper violet, and that it therefore con- 

 tains an alkali, which according to the experiments of Marcet 

 and Berzelius is soda. It contains also common salt and some 

 other saline bodies, the nature of which has not yet been ac- 

 curately determined. It contains also albumen and a quantity 

 of water, amounting at an average to about nine-tentiis of the 

 serum. — The following Table exhibits the constituents of hu- 

 man serum as determined by Berzelius and Marcet : 



Berzelius. Marcet. 



Water 90-5 9000 



Albumen .... 80 8-68 



Salts 1-5 132 



1000 10000 



So 



