Water tanks for batteries.
--A correspondent of the New York Times on the Brooklyn, off Pensacola, writes that the Southern tacticians are not idle, telescopes show they have hit upon the really splendid ides of converting water tanks into formidable batteries.--Sand is packed firmly, tightly and "danced on" in them, and they literally line the road from Fort McRae to the Warrington Navy-Yard. They have evidently been arranged by a practical engineer. Fort Barrancas is now in genuine fighting trim.