Elmowhichthrewaprojectileweighing2，500pounds。And，now，whatistheextentofwhatwehaveseenourselves？Armstronggunsdischargingshotof500pounds，andtheRodmangunsprojectilesofhalfaton！Itseems，then，thatifprojectileshavegainedinrange，theyhavelostfarmoreinweight。Now，ifweturnoureffortsinthatdirection，weoughttoarrive，withtheprogressonscience，attentimestheweightoftheshotofMahometII。
andtheKnightsofMalta。\"
\"Clearly，\"repliedthemajor；\"butwhatmetaldoyoucalculateuponemploying？\"
\"Simplycastiron，\"saidGeneralMorgan。
\"But，\"interruptedthemajor，\"sincetheweightofashotisproportionatetoitsvolume，anironballofninefeetindiameterwouldbeoftremendousweight。\"