51 8 Veterinary Medicine. 



even in dropping out of the pipette the first two or three drops 

 which are mainly diluting fluid, so that the blood mixture may 

 be secured. 



To get reliable results the blood must be drawn from the 

 cutaneous capillaries. In the domestic animals Moore, Haring 

 and Cady found that an incision on the lower surface of the tail, 

 near its root, proved very satisfactory. The skin is first cleaned 

 and sterilized, care being taken to avoid chilling on the one hand 

 or unduly warm applications on the other. 



Leucocytes are counted by a special pipette giving a dilution of 

 one to ten and by using a diluting' fluid (3 per cent, acetic acid, 

 tinged with gentian violet) which dissolves the red globules, 

 leaving the stained leucocytes to be counted. 



