A plain reading of section 35D indicates that the Legislature has thought it appropriate to give a special benefit to the assessee in respect of expenditure specified in sub-section (2) incurred before commencement of business or after the commencement of business, in connection with the extension of industrial undertaking or in connection with setting up a new industrial unit. This provision allows amortisation of the specific category of expenditures incurred by the assessee, by way of deduction of an amount equal to one-tenth of such expenditure for each of the ten successive previous years as provided therein. The legislature, therefore, having specifically provided for amortisation of the preliminary expenditure which includes expenditure incurred for issuance of shares by the assessee in connection with the issue of shares, the said expenditure on issue of shares is not eligible for depreciation.