"Morus sets out to provide a new ’Big Picture’ of nineteenth-century physics that is more in tune with the insights of recent work in the history of science, this time by focusing on the cultural history of physics and on the question implicit in his title: How and when did physics become king of the sciences? How did it emerge as a discipline and acquire the great cultural authority it possessed by the end of the nineteenth century? Very few good histories of nineteenth-century physics have been published, and none takes quite the approach Morus does here. In short, there is currently no book even closely equivalent to this."

Bruce J. Hunt, author of T he Maxwellians

"Morus is to be congratulated on writing an account of the rise of physics that is not only accessible to scientists, students, and the general reader but of major interest to scholars studying nineteenth-century European history. From French mathematics to German romanticism, from the precision laboratory to spiritualism, When Physics Became King explores the concepts, skills, institutions, and societies through which a new and international discipline was forged. The rise of the physical sciences should henceforth be integral to any general history of modern Europe."

Andrew Warwick, author of Masters of Theory: Cambridge and the Rise of Mathematical Physics

"This is a story about the ascendance of physics as viewed by the public and, more importantly, by government and industry. As
Morus puts it, physics became ’the ultimate authority in nature’. It is a fascinating story, well told and mostly based on the latest
research by professional historians of science."

Stephen G. Brush | Nature

 "In a beautifully written and engaging synthesis, Morus sheds new light on familiar topics and people .... The result is by far the best history of 19th-century physics that is now available."

Jeff Hughes | Physics World

"This delightfully written book traces the evolution of the subject from the relatively obscure world of 18th century
Natural Philosophy to the end of the 19th century with Physics established as a University discipline requiring proper training, having a well-defined career structure, and imposing research obligations on working physicists....The book is informative, well structured and a joy to read. It ought to appeal not only to the relatively narrow audience of science historians, but to working physicists and to the general public."

A. Calogeracos | Contemporary Physics

"A masterfully written historical analysis. . . . The book, which fills most admirably a huge gap in the secondary literature, is a ’must read’ for undergraduates. I also highly recommend it to historians of science and technology; to general historians, for the understanding it offers of the importance of physics to 19th-century economies and notions of nationalism; and to scientists, for the sense it provides of the importance of sociocultural context to scientific content."

Myles W. Jackson | American Scientist

"Iwan Rhys Morus’s excellent history of physics in the 19th century, When Physics Became King, considers the field in an age when physics and physicists came to play a prominent role in the culture. . . . A few good histories of physics during that remarkable age exist—but none as readable or comprehensive as Morus’s superb book."

Robert M. Brian | Physics Today