Meta Stern Lilienthal, From Fireside to Factory (1916)
“ Closely allied with the manufacturing occupations are those branches of industry classified in the census reports under the heading: "trading and transportation." They comprise all commercial activities. Merchants, clerks, bookkeepers, salesmen and women, typewriters, telegraph and telephone operators, etc., are enumerated in this class. Flourishing industries are invariably accompanied by flourishing commerce, and the capitalistic system of production depends upon a constant expansion of trade. ”
