Introduction to philosophy an inquiry after a rational system of scientific principles in their relation to ultimate reality This book, "Introduction to philosophy an inquiry after a rational system of scientific principles in their relation to ultimate reality", by George Trumbull Ladd, is a replication of a book originally published before 1891. 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.