Page:Some Aspects of the Tariff Question.djvu/14

Valuable aid has come from students who have worked with me on these topics in Harvard University. I have to acknowledge more particularly the aid of Mr. D. F. Dunbar, on the tin plate industry; of Mr. H. L. Perrin, on some aspects of the sugar trade; and of Mr. E. P. Coleman, on copper. Among my colleagues in the University, Dr. M. T. Copeland has given information and helpful suggestions on the fourth Part, dealing with textiles; and Mr. A. H. Cole has kindly read all the proofs and given me the benefit of his helpful criticism.