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Fig. 10.1 — Action of colchicine on the Crocker sarcoma in a mouse. All the nuclei which 

 appear as black dots are in a condition of arrested metaphase of the "ball type, with 

 clumping and progressive fusion of chromosomes. There is no hemorrhagic effect m 

 this area. Nuclear staining: iron-hematoxylin. (From an original preparation from the 

 collections of the Department of Pathology, Brussels University. A. P. Dustin, 1934"') 



