In addition, stock tickers, telephones, telephone switchboards, and typewriters were made the Hammond typewriters were perfected and made there. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Both the ancient universities, says Hammond, in his account of the eighteenth century, were the universities of the rich. 赫伯特·乔治·威尔斯.世界史纲.