Show instruments or OF WAR the liverpool times ays that the first gun for the english steamer horatio 1160 is nearly finished and will be ready for trial in afew a few days it will weigh with 11 its ilg 3 carriage fifty tons according to the estimate which have ave been m made ade of its capabilities it will throda throw a shot of half a ton weight a distance of four foor miles two and a quarter barrels of gunpowder or two hundred and twenty five pounds pou n d 9 will be required for a single charge if such guns as these are ever brought into practical praet ical and successful operation they will make little of the walls and fortresses of engineering skill A coi col respondent of the new york mirror mir writing from washington says hat that the great twelve inch gun with which lieutenant dahlgreen has been experimenting burst after nineteen teen hundred hundl ed shots were vere fireda fined fired tailing talling into three pieces the breach dividing into two equal halves and the chase or forward part of the gun remaining entire the same correspondent correspond eM states that the ordnance department depart mert have decided on adopt inz ine a uniform gauge or calibre for all their small arms the musket erfle and pistol viz fifty eight one hundredths of an inch this will simplify the supply supplying inc inz of |