mixt contract

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
MIXT CONTRACT, civil law. One in which one of the parties confers a benefit 
on the other, and requires of the latter something of less value than what 
he has given; as a legacy charged with something of less value than the 
legacy itself. Poth. Oblig. n. 12. See Contract. 
    

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