THE ERGASTOPLASM IN THE MAMMARY GLAND AND ITS TUMOURS l8g 



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Fig. i6. Another aspect of A cells in a human mammary carcinoma. Ik-ie 

 again the granularity of chromatin is evident. Ergastoplasm is restricted only to 

 cytoplasmic remnants due to distension of its channels. This intense vacuolization 

 leads to a lace-like pattern and probably corresponds as in F'ig. 12 to necrosis. 

 At upper left a "B" cell with normal cytoplasm shows that preservation of the 

 preparation cannot be responsible for the lace-like aspect, x 7200. 



