PLATE I 

 HUMAN BLOOD, x 700 (Sobotta) ' ? 



(Dry preparation. Ether-alcohol. Hematoxylin-eosin. In I, 3, and 4, Ehrlich's triacid 

 solution.) 



6 to 12, inclusive, erythrocytes, or red corpuscles (9, nucleated corpuscle). 



1, small lymphocyte. 



2, 3, polynuclear leucocytes, with neutrophile granulation. 

 4, 5, 14, 1 6, 1 8, ordinary polynuclear leucocytes. 



15, 19, 21, leucocytes, with eosinophile granulation. 

 13, 20, large lymphocytes. 

 17, mononuclear leucocyte. 



FROM THE BONE-MARROW OF A MOUSE, x 700 



22, pplynuclea* giant-cell. 



23, zo, marrow-cells. 

 25, 26, eosinophile cells. 



27, 28, cells with beginning karyokinesis. 



29, erythrocyte. 



30, 31, nucleated erythrocytes. 



These figures can be studied to best advantage in connection with the text relating to the 

 development of blood-corpuscles and leucocytes. 



