Ill] HUMAN BLOOD CORPUSCLES. COUNTING 29 



it is then washed for a second or two, stained, washed as before, 

 then either dried, or dehydrated, and mounted in balsam. 



Counting corpuscles. The following fluids are sometimes used 

 instead of Hayem's for counting red corpuscles, (a) Sodium 

 sulphate, sp. gr. 1025, (6) sodium chloride '8 or -9p.c., (c) Pacini's 

 fluid consisting of mercuric chloride 2 parts, sodium chloride 

 44 parts, glycerine 26 parts, water 226 parts. 



