<prompt> Qedela le nkulumo elandelayo: Ngo - 1893, uLewis wathunywa yiPennsylvania Forestry Commission ukuba adwebe imifanekiso engu - 50 ngemibala yamanzi yamaqabunga ezihlahla ukuze ayiswe eWorlds Columbian Exposition eChicago. Umsebenzi kaLewis wawubhekwa njengempumelelo, wamzuzela indondo nediploma, futhi isethi yemidwebo yaphinde yaboniswa esidlangalaleni ngo-1901 Pan-American Exposition eBuffalo, eNew York, kanye ne  <response>: Ngo-1904 umbukiso wokuthengwa kweLouisiana eSt. Louis. 