 During the 1930s significant commissions were received from the USA, including a series of mass-produced charts for the National Tuberculosis Association and Otto Neurath’s book "Modern man in the making" (1939), a high point of Isotype on which he, Reidemeister and Arntz worked in close collaboration.Rudolf Modley, who served as an assistant to Otto Neurath in Vienna, introduced ISOTYPE methods to the United States through his position as chief curator at the Museum of Science and Industry in Chicago.Furthermore, by 1934 Modley established Pictorial Statistics Incorporated in New York, a company which promoted the production and distribution of ISOTYPE-like pictographs for education, news, and other forms of communications.