Walter R. Miles (1885-1978) was an American experimental psychologist very much interested in laboratory apparatus and procedures and their applications to human behaviour. Early in his career, Miles received an appointment as a research scientist at the Carnegie Nutrition Laboratory in Boston, Massachusetts. World War I severed many of the relationships that the Carnegie Laboratory had with research counterparts in Europe. After the war, efforts were made to re-establish these ties. From April through August of 1920, Miles visited fifty-seven laboratories and institutes in nine different countries throughout Europe, documented his journey in exquisite detail, and gathered the information into a highly detailed report of more than three hundred pages. The report, never formally published, is now available in print, and title provides unique information about the workings of major centres of physiological and psychological research in early twentieth-century Europe. The book is introduced by C. James Goodwin, a renowned Miles scholar.