Another Explosion.—We learn from the officers of the steamboat Gant, arrived here last night, that the steamer Laura, plying on the Ouachita river, burst her boilers on the 8th inst., at Point Reynaud, three miles below Ouachita City. Fortunately there were but three persons on the boat at the time of the explosion, and they escaped uninjured.—New Orleans paaer [sic].