A throwing goods overboard to lighten or save the vessel, in which case the goods so sacrificed are a proper subject for general average. Dig. 14, 2, “de lege Rhodia de Jactu.” And see Barnard v. Adams, 10 How. 303, 13 L. Ed. 417. Jactns lapilli. The throwing down of a stone. One of the modes, under the civil law, of interrupting prescription. Where one person was building on another’s ground, and In this way acquiring a right by usucapio, the true owner challenged the intrusion and interrupted the prescriptive right by throwing down one. of the stones of the building before witnesses called for the purpose. Tray. Latin: Max.