Ademption pro tanto where stock, specially bequeathed, exists in part only at testator's death

Where stock which has been specifically bequeathed exists only in part at the testator's death, the legacy is adeemed so far as regards that part of the stock which has ceased to exist. A bequeaths to B his 10,000 Taka in the 5› per cent. loan of the Government. A sells one-half of his 10,000 Taka in the loan in question. One-half of the legacy is adeemed.