* 



*m 



Fig. 47 



Mast cells in afresh spread of ox peritoneum; fixed alcohol, stained toluidine- 

 blue. The cytoplasm is packed with dark metachromatic granules ( 535). 

 (Riley (1954), Lancet, p. 841.) 



Fig. 48 



A part of the same tissue spread as in Fig. 47. This area was dipped in water 

 before being fixed with alcohol. There is now disruption of the mast cells; 

 their nuclei stain darkly; and much of the metachromatic material has 

 diffused out of the cells and become attached to adjacent connective tissue 

 fibrils ( X 535). (Riley (1954), Lancet, p. 841.) 



