Economics of bridgework a sequel to Bridge engineering. Boston Society of Natural History. Occasional Papers. This book, "Economics of bridgework a sequel to Bridge engineering", by J.A. L. Waddell, is a replication of a book originally published before 1921. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.