Nandlal Bhandari Mills Ltd., is a public company incorporated in Indore under the Indore Companies Act, 1914. It C owns and runs a textile mill and some ginning factories. The Income-tax Officer assessed the Company for the assessment years 1950-51, 1951-52, 1952-53 and 1953-54 on its income of the corresponding accounting years, being the calendar years 1949, l950, 1951 and 1952. In the course of the assessments it became necessary to ascertain the written-down D value of the building, machinery, plant etc. of the respondent company as on January 1, 1949. On April 1, 1950, the Indian Income-tax Act, 1922, was extended to Part B States, including Madhya Bharat of which Indore became a part. Till the said date, the assessee was for many years assessed in the Companies Circle, Bombay, as a non-resident and for some years as a resiE dent under the Indian Income-tax Act, 1922. It was also assessed to Industrial Tax under the Indore Industrial Tax Rules, 1927. For those years in which it was assessed as a non-resident under the Indian Income-tax Act, 1922, only that part of its profits which could be said to be attributable to the sale proceeds of goods received in British India or in regard to which F contracts were accepted in British India was brought to tax. After the Indian Income-tax Act was extended to Indore, difficulties arose in the matter of fixing depreciation allowances, for the rates obtaining under the Indian Income-tax Act and those obtaining under the Indore Industrial Tax Rules, 1927, were not the same. After the merger of the State in the Indian Union, G in order to rationalize the tax structure, the Central Government in exercise of the power conferred on it under s. 12 of the Finance Act, 1950, issued the Order whereunder in the case of such disparity the greater of the two sums allowable was directed to be adopted. During the assessment years, pursuant to the terms of that Order, the Income-tax Officer took into account the depreH ciation allowances for the years up to and including 1944 as computed under the Indian Income-tax Act, 1922, and for the