1852-1943 1860-1951 1972 2018c-162 978 accidents autobiography battlecreeksanitarium(battlecreek biography breakfast breakfastcereals business casestudies cerealproductsindustry companytowns digestion economics ediblegrain entrepreneurship environmentalaspects foodindustry history historybattlecreeksanitarium(battlecreek historybunkerhillminingcompany historykelloggcompany historykelloggtoastedcornflakecompany idaho industrialists johnharvey leadminesandmining local medical michigan mineaccidents miners mining occupational physicians psychologicalaspects psychology sanitaryengineering silverminesandmining singleperson socialconditions sunshineminedisaster technologicalinnovations unitedstates widowhood widows