It may be defined as a future interest not transmissible to the representatives of the party entitled thereto. in case he dies before it vests in possession. Thus, if a testator leaves the income of a fund to his wife for life, and the capital of the fund to be distributed among such of his children as shall be living at her death, the interest of each child during the widow’s life-time is contingent, and in case of his death is not transmissible to his representatives. Mozley & Whitley.