. . . "y taxable estate by reason of my death, including interest and penalties thereon, if any, (b) debts and expenses of administration of my estate, and (c) any bequests under my Will, other than a residuary bequest, the Trustee shall, upon the request of the representative of my estate, contribute from the principal of the trust estate the amount of such the deficiency; and in connection with any suc" . .