of the Blood of Cholera Patients. 351 



So that the albumen and salts together constitute 9'5 or 10 

 per cent, of the whole serum. 



The following Table exhibits the proportions of water, al- 

 bumen and salts, in the different specimens of cholera serum, 

 whose specific gravities have been given in page 348. 



1. Pure yellow serum. 



Water 83-95 



Albumen and salts . . . 1605 



10000 



2. Serum slightly tinged red. 



Water 83-96 



Albumen and salts . . . 16-04> 



100-00 



3. Serum very red. 



Water 81-17 



Albumen and salts . . . 18-83 



100-00 



4. Serum very red. 



Water 81-1 



Albumen and salts . . . 18*9 



100-0 



5. Serum of a very deep red. 



Water 80-82 



Albumen and salts . . . 19*18 



100-00 

 The first two of these were so nearly pure that we may 

 consider them as exhibiting very accurately the constitution 

 of the serum. The last three were tinged with colouring 

 matter, to which probably the increased weight of the solid 

 portion was at least partly owing. If we suppose the water 

 in the serum of healthy blood to be 100, the albumen and 

 salts will be 11-11 ; while if we make the proportion of water 

 in cholera serum the same, the albumen and salts will be 

 19-11. So that the solid constituents of cholera serum are 

 to those of healthy serum nearly as 1-74 to 1. 



IV. Salts of Cholera Serum. 

 To determine the quantity and nature of the salts contained 

 in cholera serum, 304-3G grains of serum were exposed to the 

 temperature of 159° in order to produce coagulation. The 

 coagulum thus obtained was tiried in a heat of about 200° till 

 it ceased to lose weight. The whole was now reduced to 



48-85 



