This book comprises nine essays, selected from Roy MacLeod's work on the social history of Victorian science, and is concerned with the analysis of science as a responsibility and opportunity for 19th-century statecraft. It illuminates the origins of environmental regulation, the creation of scientific inspectorates, the reform of scientific institutions, and the association of government with the patronage and support of fundamental research. Above all, it explores several of the ways in which British scientists became 'statesmen in disguise', negotiating interests and professional goals by association with the interests of the state as 'provider' and agent of efficiency in education and in the application of research.