The respondent company carried on business at 38, Mount Road, Madras. Its main business being the manufacture and sale of machinery and parts of machinery and accessories. For manufacturing parts of the machinery, the company maintained a foundry and in 1952 it purchased two arc furnaces for a sum of Rs. 2,13,512.81 for the purpose of using the same in its founD dry. In the account books and the balance sheet of the company these furnaces were shown under the heading "workshop equipment". According to the company the furnaces were found to be unsuitable for the purpose for which they had been purchased and therefore they were disposed of in 1958 to a purchaser in Calcutta for a sum of Rs. 4,20,000. For the assessment E year 1958-59 the assessing authorities sought 10 include the amount of Rs. 4,20,000 in the turnover of the company although it was maintained by the cOtjlpany that the sale represented an isolated sale of its fixed capital assets. The appeal before the Sales Tax Appellate Tribunal, Madras, also failed. The view of the tribunal may be stated in its own words :-