Page "Reading Viaduct" Paragraph 16

The extensive work of creating these grade separation projects was extensively covered in the Proceedings of the Engineers ' Club of Philadelphia ( volume 16, page 1 ) in " Pennsylvania Avenue Subway and Tunnel " based on a paper read by George Webster on October 15, 1898 and in the Journal of the Engineers Society of Pennsylvania ( volume 8, page 303 ) in an article titled " Grade Separation — Two Distinct Methods " based on a paper delivered on November 16, 1916 by Samuel Wagner, Chief Engineer of the P & R.