Nyorai mberi kweiyi ndima - Hammer's incandescent light bulb collection kubva kumativi ose enyika yainzi "The History of an Art" uye akairatidzira panguva dzakasiyana-siyana mumagetsi ekuratidzira uye anoratidza. Akatanga kuiratidzira muna 1882 paInternational Electrical Exposition paCrystal Palace muLondon uye akapiwa menduru yesirivha nokuda kwokuratidzira kwacho. Paakapa muunganidzwa wake paSt. Louis World's Fair ya1904
akapiwa Mubayiro Mukuru.