Show the e monster ons er gun nn of the age tile the pittsburg 0 commercial gives tile the following n account of tile the 0 casting of a 20 iric inch 11 gun it at tile the fort pitt works one of the most moat important events in the history of the rebellion and which a new era in tile the manufacture of heavy guns took place on thursday between twelve and one at the foit pitt A wun nin with a calicle of twenty indies inches diameter was cast on the principle in some twenty two minutes from the time of tapping tappin tile the fill naces the ai arrangements range ments for casting this mammoth of ordnance were most perfect and during the process everything worked like clock work tile the amount of metal used for this huge gun was e eighty i r clity five tons or one linn bun died and seventy tholand pounds tile the metal was melted in three furnaces fui naces which were charged at five in the evening at twenty minutes past twelve everything being 0 in readiness the three furnaces were simultaneously tapped and the i olten molten n metal was vas conveyed by means of three conduct ais to a large reservoir close to the mould the mould was set perpendicular in a mammoth pit and was held in position by lingo huge chains suspended flom two laige 0 cranes of a lifting capacity of forty tons each and worked by steam As bon as the was sufficiently charged 0 the metal flowed fl horn om it into tho the mo mould bild lild and in twenty two minutes from the time of tapping tile furnaces the mould was filled to within a few indies inches of the top As the metal settled tile mould was filled b by y the workmen with metal from the furnaces fur held in reserve in in case of accident the casting was perfected without the slightest confusion the whole being done under the immediate superintendence of mr joseph kave kavc foreman of the works we are arc indebted to capt joseph if knapp for tile alie following 0 statistics which will give our readers a better idea of the magnitude of her casting weight t of gun in the I 1 lough lbs ibs weight dibon finished lbs total length adilen wn finished 20 ft 3 in length ot of bore 17 ft 6 in ill diameter 5 ft fl 2 in minimum diameter 2 it 10 in the gun it is is estimated ivill use nse a spherical shot of half a ton weight and a small shell of seven hundred and fifty pounds if tile the gun was rifled it is thought it would throw a slid s alid shot of one ton in wei weight lit the amount of powder r to bo be used in charging tile the gun is estimated aiom eighty to one hundred pounds the gun is said to be the largest in tile the wo d and to pittsburg 0 belonos belongs 0 tile honor of adding such a heavy piece of ordnance to the science of war the casting of the gun as we before remarked was ou oil tile the core principle invented by maj rodman Rod mari U S I 1 the core consists of a an iron iron cylinder half an inch in thickness through which a stream of water is kept continuously running during dining the process of ousting castings this cylinder was wrapped with rope covered by sand and outside of this fo for r a short distance from the mouth of the mould is a sheet iron cylinder during tile the casting tile the water discharged from tile the tore core indicated a temperature of from doity to forty two degiers degie cs the rhe gun will remain in it tile the pit underground durin during tile tho cooling process some ten days daya or two weeks after which it will be hauled out by means or of tile the large cranes lef elred to and removed to tile the finishing dep department artill ailt ot OF tile the works where it will be placed in ft a lathe and finished it is not known what disposition will bo be made of tile the gun when comp plated sted but it is thought not ble that it will be placed in donac sonac of the tae defenses of new york harbor if so we aou would id hotl like to insure safety of the alack ack i w NT ta 0 bior ay iy royal oak or la gloira glora al ild they attempt an ent cn lace f of the gaibor with bailik c intent n shot from this monster would cru vessels to pieces u |