Book excerpt: In Physicists Look Back: Studies in the History of Physics, various international contributors ranging from physicists, engineers, theoreticians, experimentalists, and information scientists to educationalists, science historians, sociologists, and physics teachers discuss the history of physics. They describe their own research developments, demonstrate ways the history of physics can be helpful in teaching physics and in clearing up difficult concepts, and offer professional advice about resources and methods. This diversified book provides a historical background to modern physics and illustrates how an appreciation of the historical context of physics can lead to a better understanding of modern physics. It covers the history of ozone, the ionosphere, plasma physics, the technical developments of the electron microscope and crystallographic x-ray photography, and the history of the Josephson effect. Well illustrated and containing some autobiographical research not previously published, this resource is valuable reading for professional physicists, physics teachers, educationalists, historians and philosophers of science, and physicists.