Economic Though and Methods Quakers in Science and Industry: Being an Account of the Quaker Contributions to Science and Industry during the 17th and 18th Centuries. By Arthur Raistrick. New York: Philosophical Library, 1950. Pp. 361. $6.00. Democracy and the Quaker Method. By Francis E. Pollard, Beatrice E. Pollard, and Robert S. W. Pollard. New York: Philosophical Library, 1950. Pp. 160. $3.00. Quaker Social History, 1669–1738. By Arnold Lloyd (Introduction by Herbert G. Wood). New York: Longmans, Green & Co., Inc., 1950. Pp. 207. $5.00.