149. When thing bequeathed is a valuable to be received by testator from third person and testator or his or her representative receives it. Where the thing bequeathed is not the right to receive something of value from a third person, but the money or other commodity which shall be received from the third person by the testator himself or herself or by his or her representatives, the receipt of the sum of money or other commodity by the testator shall not constitute an ademption; but, if he or she mixes it with the general mass of his or her property, the legacy is adeemed. 150. Change by operation of law of subject of specific bequest between date of will and testator’s death. Where a thing specifically bequeathed undergoes a change between the date of the will and the testator’s death, and the change takes place by operation of law, or in the course of execution of the provisions of any legal instrument under which the thing bequeathed was held, the legacy is not adeemed by reason of that change. 151. Change without testator’s knowledge. Where a thing specifically bequeathed undergoes a change between the date of the will and the testator’s death, and the change takes place without the knowledge or sanction of the testator, the legacy is not adeemed. 152. Stock specifically bequeathed lent to third party. Where stock, which has been specifically bequeathed, is lent to a third party on condition that it shall be replaced, and it is replaced accordingly, the legacy is not adeemed. 153. Stock specifically bequeathed sold but replaced. Where stock specifically bequeathed is sold, and an equal quantity of the same stock is afterwards purchased, and belongs to the testator at his or her death, the legacy is not adeemed.