Scientific American, Volum 82

acid aeroplane alloy aluminium amount amperes annealing antimony appear atomic atomic weight body carbon cathode cause cent cerium chemical coal color combustion considerable containing copper corrosion cubic curve diameter discharge earth effect efficiency electric electrolytic engine experiments fact feet Frederick Converse gases glass guns heat hydrogen important inches increased iron jute lamp less light lines liquid machine manufacture material matter mean effective pressure means ment metal method millimeters Munn nature necessary nickel nitric acid observed obtained operation ordinary Otto cycle oxide oxygen paper photosphere plant plate Podokesaurus possible pounds practically present pressure produced radiation radium rays rods Scientific American shown soil solution spectrum speed steam steel substance supply surface temperature theory tion tons trucks tube ture velocity weight welding wheel wood zinc