red-violet colour, e granulation) with the neutral 

 constituent of Erhlich's triacid stain. The nucleus is 

 convoluted, horse-shoe or S-shaped, staining deeply. 

 The granules are fine and stain reddish with Roman- 

 owsky. These cells are markedly amoeboid and = 

 mikrophages ; but malarial pigment is very uncommon 

 in them (Fig. 2). 



Easinopbil Leucocyte. 12-15/4. The nucleus is 

 polymorphic in type but very frequently consists of two 

 lobes joined by a strand (pince-nez) staining less deeply 

 than the previous form. Characteristic are the large 

 granules (a or oxyphil granulation), which stain coppery 

 red with triacid, Jenner, Leishman and Giemsa, but 

 faintly only or not at all with ordinary Romanowsky, 

 unless the blue is well washed out (Fig. 2). 



Mast Leucocyte (oibasophil cell). About 10/4. The 

 nucleus is of an irregular characteristic polygonal shape, 

 and stains very feebly. Characteristic also are the baso- 

 phil (7) granules, which are even larger than eosinophil 

 granules. They are soluble in water, so that to shew 

 them properly an alcoholic stain is necessary, e.g., 

 Jenner's. Triacid does not shew them. Romanowsky, 

 Giemsa, and Leishman do not shew them well. With 

 absolutely pure methylene blue they stain blue, but 

 methylene blue nearly always contains a trace of 

 ' azure ' and they stain instead with this derivative, 

 i.e., they stain violet. This is spoken of as staining 

 metachromatically ; and this property of staining, not 

 with a pure stain but with its derivative, is character- 

 istic^ mast granules (Fig. 2). 



Lymphocyte. Two forms occur (a) young forms 

 6-<W i.e., about the size of a red cell, forming the 

 majority. These have a round or oval nucleus staining 

 deeply, and the rim of protoplasm is quite narrow and 

 deeply basophil. (b) Old forms about 12/4. The 



