THE ESSENTIALS OF HISTOLOGY 



FlG. 4. H.EMACYTOMETER OF GOWERS. 



r" 



P 



FIG. 5. HUMAN BLOOD AS SEEN ON THE WARM 

 STAGE. (Magnified about 1,200 diameters.) 



r, r, single red corpuscles seen lying flat ; ? J , r 1 , rerl cor- 

 puscles oil 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 c/, 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.) 



