The First Steam-Boat

Ten Ounces Troy, an e^ual quantity of Lead hardly Six, of commonWater fo no- thing; better ’than half an Ounce, fo that Goldlis a)>out Nineteen, and LeadiaW Eleven times “Denier or Specifically hea- vier than Water, and thus of any ower. Specifick Gravity then is Apyrop™^ or the Gravity Peculiar to any îody,where- by It may be Diftingulihed from Bodies of a different Kind ; ”Tis fometimes, anå not improperly call'd Relative or Cowpantive Gravity, which to diftinguiû) rt from Ab- folute or pofitive Gravity, which hft «*- creafes always in ?™P°5tl0£.t0 the Bulk of the Sody, weigh’d Jireaiy, the other not-, abfolutelyconbder'd, aîoundol.one Thing, is as heavy as a Toønd of ancrthe , witÄ Regard to Avhat their Specifick Gravity is, but their Relative Gravities or Bulk, for M th?? ave XerV aiher7’v- A Body Specifically heavier than a Tlufd will fink therein, because it weighs more than the Tluià, it ced, andwholeKoomittakesup-, ^that the Imaginary Surfice immediately under th« Body being there more prefsM than by the Wateri» any other Partait there- fore yields and lets it thro’, ïut a Bo3y fpecifically lighter than aPluid will al- ways rife therein because it prefieslefson the imaginary Surface beneath it than the ° J f Tluid