Mustered into Service.—The 30th Regiment ie now regularly organized and mustered into the service of the U. States. In addition to the eight couipauicg pientiouod iu our Wednesday's paper, Capt. White’s (Warsaw) company, and Capt. Silvers (Fort Wayne) bavobeen assigned to the 30th regiment. All the companies are full, except Capt. Silver’s, which will receive a few more men. This will be a favorable opportunity for volunteers wishing to get into! immediate service.