MiLiTAE's Alarm Skoals.—Yesterday, Captain Norton, who recently arperimented at Chatham with his liquid fire-Bheli aad some new description of bullets he has invented, she effects .of which are very remarkable, again attended at the head-quarters of the Royal Engineers’ establishment, Brompton, for the purpose of exhibiting an equally valuable invention of his, named the explosive percussion bolt-signal, which bo found of great use as a military alarm si-nal. ttttetrial of the invention yesterday, the 81b7{jk J*®*® taken in the hand and being allowed to fall cither on fche earth or even on the grass, exploded withi a s^Hcieutly loud report to be heard at a considerable disitonoe. Capt. Noiton -,‘royosea to apply the same principle to signals to be used on the railways, so as to enable mongers and guards to communicate with the drivers 01 engines.* i-U ~ —