Modestly radical empiricism / Lawrence Sklar -- Observation and the scientific enterprise / Dudley Shapere -- Observations, explanatory power, and simplicity : toward a non-Humean account / Richard N. Boyd -- Probability and the art of judgment / R.C. Jeffrey -- Method of hypothesis : what is it supposed to do, and can it do it? / Peter Achinstein -- Idealizations and the testing of theories by experimentation / Ronald Laymon -- An interpretation of theory and experiment in quantum mechanics / Geoffrey Joseph -- Birth of the magnetic-resonance method / John S. Rogden -- Artificial disintegration and the Cambridge-Vienna controversy / Roger H. Stuewer -- Bubble chambers and the experimental workplace / Peter Galison.