Powder-Mill Exploded.
--The "North Carolina Powder Mill," located twelve miles from Charlotte, North Carolina, was again blown up last Thursday. Three men--one white man and two mulattoes — were blown up in the mill. The white man — Abernathy — and one of the negroes were killed. Others were badly, and probably mortally, injured. It has been but a short time since the mill was put in operation after the first blowing up.