THE ESSENTIALS OF HISTOLOGY 



FlG. 4. H^EMACYTOMETER OF GOWERS. 



FIG. 5. HUMAN BLOOD AS SEEN ON THE WARM 

 STAGE. (Magnified about 1.200 diameters.) 



r, r, singje red corpuscles seen lying flat ; i j , r', red cor- 

 puscles on their edge and viewed in profile ; /", 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 shapeat the moment of observation ; in g, a nucleus 

 also is visible. 



FIG. 6. HUMAN RED CORPUS- 

 CLES LYING SINGLY AND COL- 

 LECTED INTO ROLLS. (As seen 

 under an ordinary high power 

 of the microscope.) 



