Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 227
;iliA. //istitllU ro/.A7rj/„te ^. n,j.4. ru) -? … Fiyi. ■» - • A rrii! Ill f^4^ <|i ^i 1 lAfiriirciiiyJJiiif- Report on the Use of Heated Jlir in Iron Works. 219 The mixture of ore, when roasted, contains 60 per cent, of iron. To appreciate the savinj; which lias resulted attlie Butterlj works,from the use of hot air, it is necessary to know…
Science · Technology · Meteorology · Patents
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
