76 ADVANCED LESSONS IN PRACTICAL PHYSIOLOGY 



latter, chloroform, until the drop retains a central position. The spe- 

 cific gravity of the mixture is then determined by means of the hy- 

 drometer. 



Annotation. Since the specific gravity of normal blood varies with the amount 

 of iron in the corpuscles, it must also vary with the percentage of hemoglobin. 

 Thus, the former corresponds to the following values of hemoglobin : 



1.033 to 1.035 = 25 to 30 per cent. Hb. 



1.035 to 1.038 = 30 to 35 



1.038 to 1.040 = 35 to 40 



1.040 to 1.045 = 40 to 45 



1.045 to 1.048 = 45 to 55 



1.048 to 1.050 = 55 to 65 



1.050 to 1.053 = 65 to 70 



1.053 to 1.055 = 70 to 75 



1.055 to 1.057 = 75 to 80 



1.057 to 1.060 = 85 to 90 



