Cap. 16 Art. 648How abatement is determined.

For the purpose of determining the abatement, the following rules shall be observed:

(a) all the property of the testator, existing at the time of his death, shall be formed in one bulk, after deducting therefrom the debts due by the estate;

(b) any property which has been disposed of by way of donation shall be then fictitiously added, such property being reckoned at its value at the time of the donation;

(c) the disposable portion shall then be computed according to the estate thus formed, regard being had to the rights of the surviving spouse in accordance with articles 615 to 639.