Magnetic Fever explores the links between science and empire in the nineteenth century, focusing on the mutual interactions of British imperialism and geophysical empiricism. The nineteenth century was a time when science was becoming global, in part due to European colonial and imperial expansion. Colonies became not just propagation points for European science, but also collection points for geophysical investigations that could be carried out on a worldwide scale. Just as European politics influenced the expansion of scientific projects, these “colonial observatories” influenced the type of science that could be done. Comparing the development of British and American geomagnetic research during this period shows the dependency between the two influences. Both the scientific theories and the geopolitical realities played a role in creating the tool for studying global science still in use today. Christopher Carter has researched imperial science in the British empire, especially concerning the geophysical fields: terrestrial magnetism and meteorology. He has presented papers on imperial science at history of science conferences. Currently Dr. Carter is a visiting assistant professor at Duke University, teaching courses in the history of science.