LX. Estimation of haemoglobin. 



1. Appliances. v. Fleischl's haemometer; medicine dropper; 

 distilled water; needle and holder; capillary tube; lamp. 



2. Preparation. See that the capillary tube is perfectly 

 clean and dry; if there is any doubt, draw a thread wet 

 with ether and alcohol through it. Fill one side of the 

 metallic cell about one-quarter full of distilled water. 



FIG. 44. 

 FIG. 44. Fleischl's Haemometer. 



j. Operation. Puncture the ear and obtain blood drop. 

 Just touch outside of drop with capillary tube held in 

 a horizontal position; it should quickly fill by capillary 

 attraction. Carefully and quickly wipe away any blood 



273 



