228 CIRCULATING FLUIDS: 



of different ages should be instituted. Possibly we should also 

 regard the influence of their various modes of life, and (if we 

 ascribe any influence to the circumstance) of their temperaments. 



Experiments of this nature are still wanted, and the contri- 

 butions hitherto made with that object by no means meet the 

 exigencies of the case. Many difficulties present themselves in 

 such an investigation. 



It is not an easy matter to select individuals from whose state 

 of health we can infer that the composition of the blood closely 

 approximates to the normal standard, and after the selection 

 is made it is still harder to con^dnce them of the advantage or 

 necessity of venesection in their own cases. 



I was obliged to content mj^self with two such analyses, one 

 of the blood of a young man, the other of an unmarried female. 



Analysis 13. N — , aged 17 years, a servant, of sanguineous 

 temperament, nearly full grown and properly developed, chest 

 well arched, respiratory and digestive organs healthy, coun- 

 tenance florid and blooming, was bled from the arm. The 

 blood was apparently rather brighter than usual, and when al- 

 lowed to stand, separated into a bright red, uniformly coloured, 

 copious, and properly consistent clot, and a clear bright yellow 

 serum. 



A portion of the blood Avas whipped as soon as it was drawn, 

 and the analysis was conducted in accordance with my ordi- 

 nary plan. 



1000 parts contained : 



Water . . . . . , 791-900 



Solid residue .... 208-100 



Fibrin 2-011 



Fat 1-978 



Albumen 75-590 



Globulin 105-165 



Ha^matin 7-181 



Extractive matter and salts . . 14'174 

 100 parts of blood-corpuscles contained 6-3 of haematin and haemaphaein. 



Analysis 14. S — , a servant girl, aged 28 years; tempera- 

 ment rather phlegmatic than sanguineous; tall, strong, and vigo- 

 rous ; countenance healthy; digestion good; had menstruated a 

 fortnight before. The blood from the arm appeared rather 

 dark, and on being left to itself separated into a considerable 

 clot, and bright, clear yellow serum. 



