Summary
(1) A technique has been established for the determination of 32P uptake of the average tumour cell.
(2) A correlation was observed between nucleolar morphology, mitotic index and 32P uptake of an average tumour cell of a particular type of tumour.
(3) All the above factors increased consistently from the benign tumour to adeno-carcinoma which retains some amount of differentiation in the form of persistent acinar space and finally to carcinoma simplex where the differentiation is minimum.