Annals of the American Academy of Political and Social Science, Volume 29

American bill borough boys Calumet River canal cars census cent certificate charge Chicago Chicago River Child Labor Committee child labor law coal coal breakers commerce commission compulsory education Congress construction courts Dingley Act district docks duty Elberfeld system employed employers employment of children enforcement fact factory inspectors feet foreign fourteen franchise freight German harbor Illinois important improved increase industrial interest investigation later notice League legislation legislature lines manufacturers ment miles mines municipal National Child Labor operation passenger Pennsylvania Philadelphia political population port present Price protection Prussian railroad rates reciprocity regulation Reserved for later result River secure sixteen social South street railway superintendent sweat shop tariff tion trade traffic transportation treaties tuberculosis typhoid typhoid fever United vessels volume wharves York City York Connecting Railroad