Exhibit 12.2 Boston Edison Company Computation of Ratio of Earnings to Fixed Charges and Preferred Stock Dividend Requirements Year ended December 31, 1997 (in thousands) Net income from continuing operations $144,642 Income taxes 82,455 Fixed charges 116,258 -------- Total $343,355 ======== Interest expense $106,899 Interest component of rentals 9,359 -------- Subtotal $116,258 -------- Preferred stock dividend requirements 20,642 -------- Total $136,900 ======== Ratio of earnings to fixed charges and preferred stock dividend requirements 2.51 ====