THE ESSENTIALS OF HISTOLOGY 



FlG. 4. H^EMACYTOMETER OF GOWERS. 



FIG. 5. HUMAN BLOOD AS SEEN ON THE WARM FIG. C. HUMAN RED CORPUS- 



STAGE. (Magnified about 1,200 diameters.) 



r, r, single red corpuscles seen lying flat ; t j , r 1 , 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 shape at the moment of observation ; in /. a nucleus 

 also is visible. 



CLES LYING SINGLY AND COL- 

 LECTED INTO ROLLS. (As seen 

 under an ordinary high power 

 of the microscope.) 



