STUDY OF THE HUMAN BLOOD-CORPUSCLES. 



11 



meter of the mixture, or if multiplied by 50 x 200 ( = 10,000) the number in a 

 cubic millimeter of blood is obtained. 



FlG. 7. H^MACYTOMETER OF GOWERS. 



FIG. 8. HUMAN BLOOD AS SEEN ON THE WARM FIG. 9. HUMAN RED CORPUS- 



STAGE. (Magnified about 1200 diameters. ) 

 , r, single red corpuscles seen lying flat ; /, r', red cor- 

 puscles on their edge and viewed in profile; r", red 

 corpuscles arranged in rouleaux ; c, c, crenate red cor- 

 puscles ; p, a finely granular pale corpuscle ; g, a 

 coarsely granular pale corpuscle. Both have two or 

 three distinct vacuoles, and were undergoing changes 

 of shape at the moment of observation ; in g, a nucleus 

 also is visible. 



CLES LYING SINGLY AND COL- 

 LECTED INTO ROLLS. (As seen 

 under an ordinary high power 

 of the microscope.) 

 1, On the flat ; S, in profile. 



