[57] John Corbin: An American at Oxford. Houghton Mifflin Company, Boston, publishers.
[58] F. A. Talbot: The Making of a Great Canadian Railway. By courtesy of the publishers, Seeley, Service & Co., London.
[59] F. A. Talbot: The Making of a Great Canadian Railway. By courtesy of the publishers, Seeley, Service & Co., London.
[60] Charles Prelini: Dredges and Dredging. By courtesy of the publishers, D. Van Nostrand Company, New York City.
[61] Taken from The Century Magazine by permission of the publishers, The Century Co.
[62] Dallas Lore Sharp: The Hills of Hingham, "The Dustless Duster." Houghton Mifflin Company, Boston, publishers.
[63] Thomas W. Corbin: Engineering of To-day. By courtesy of the publishers, Seeley, Service & Co., London.
[64] Greenough and Kittredge: Words and Their Ways in English Speech. By courtesy of the publishers, The Macmillan Company, New York City.
[65] "The Catskill Water Supply Tunnel," in the Scientific American, vol. 104. By courtesy of The Scientific American Publishing Company.
[66] Mary Antin: The Promised Land. Houghton Mifflin Company, Boston, publishers.