138 THE BLOOD. 



Com/position of the Blood? 



Water 154-870 



Corpuscles 495-590 



Albumen 329-820 



Fibrin ' 8*820 



Seroline(?) 0'025 



Cholesterine 0-125 



Oleate, margarate, and stearate of soda 1-400 



Chloride of sodium, ) 3-500 



" potassium (a trace), J 



Carbonate of soda 



Free soda 



Sulphate of soda 



2*500 



Sulphate of potassa 



Phosphate of potassa.. 

 Sulphate of magnesia.. 



Phosphate of lime \ 0*360 



Phosphate of magnesia. J 



Iron 0-550 



Undetermined extractive matters 2-450 



1,000-000 



There exist in the blood certain well-determined principles 

 not given in the above table, some of which have great physio- 

 logical importance ; and it is to be expected that further 

 investigations will reveal others, among what are now called 

 extractive matters, an acquaintance with which will mate- 

 rially advance our pathological, as well as our physiological 

 knowledge of this fluid. The developments of the last few 

 years with regard to urea and cholesterine lead us to look 

 for the discovery of new principles, variations from the nor- 

 mal proportions of which will, perhaps, be found to constitute 

 important pathological conditions. In both a physiological 

 and pathological point of view, there is much to be done in 

 this line of investigation. 



Aside from the gases, we are now acquainted with the 



1 For purposes of comparison, the fibrin, albumen, and corpuscles were desic- 

 cated and weighed, giving the following proportions of dry residue : 

 Fibrin, 2-50 parts per 1,000 of fresh blood. 



Albumen, 71 '53 do. do. 



Corpuscles, 125*00 do. do. 



