Fifty years have passed since Norwood Russell Hanson's unexpected death, yet he remains an important voice in philosophy of science. This book is a revised and expanded edition of a collection of Hanson's essays originally published in 1971, edited by Stephen Toulmin and Harry Woolf. The new volume features a comprehensive introduction by Matthew Lund (Rowan University) and two new essays. The first is "Observation and Explanation: A Guide...