haemoglobin, we simply have to multiply the ratio 

 Hgb 



RJ^: b y 50,000- 



Example I. Let the red cells be 525,000 and the 

 Hgb 17 per cent. ; what is the colour index ? 



17 

 1S 525^000 X 5>oo = r6, as in pernicious or 



Dibotkriocephalus latus anaemia. 



Exam-pie 2. Let the red cells be 4,000,000 and 

 Hgb 25 per cent., what is the colour index ? 



25 

 1S 4,000,000 X 5 > 00 = '3i ? as in chlorosis. 



