PLATE I. Blood Elements. 



a, Red blood cellsj Erythrocytes, stained in Ehrlich's neutro- 



phile mixture. 



a 1 -a 2 , Red blood cells stained in eosin-methylen blue. 

 n, Microcytes. 

 h, Poikylocyte. 

 k L - k*, Nucleated red blood cells. 



6, Polynuclear white blood cells, stained in eosin-methylen 



blue. 

 i, Polynuclear white blood cells, stained in Ehrlich's neutro- 



phile mixture. 



d, Transitional white blood cells. 

 c 1 , Mononuclear white blood cell. 

 c-e Lymphocytes. 

 /, Eosinophile white blood cells. 



<;, Myelocytes, stained in Ehrlich's neutrophile mixture. 



m, Myelocytes stained in methylen blue. 

 I, Basophile white blood cell, 



o, Blood plaques or blood plates. 



