histamine: pathological tissues 





Fig. 27 



Rapid diagnosis of a mast-cell lesion. An imprint is made on a slide and is stained 



at once, as a blood film. This preparation was made by Mr. K. W. Head following 



the local excision of a mastocytoma in a dog. Leishman— Giemsa (x 1,500). 



{Photograph by Mr. R. C. James.) 



81 



