Yen, Chia-Cheow.-Born in Foochow, 1883. Married, 1901. Studied at Naval College, Tientsin, 1896-1900; at Peiyang University, Tientsin, 1902. Teacher: Government Middle School, Yung-Ping, 1905-6; Anhui Provincial College, 1906-7; Kiangsi Provincial College, 1907-9. Arrived in America, November, 1909. Government support. Prepared for college at Wesleyan Academy, 1909-10. Studied Science at the University of Illinois, 1910-13; Mathematics at Harvard University, 1913-14. A.B., 1913; M.A., 1914. President, Cosmopolitan Club, 1912-13. Chairman, Chinese Student's Alliance, Mid-West Section, 1912-13 and Vice-Chairman, 1911-14. Member: American Mathematical Society, 1914; Mathematics Club, University of Illinois, 1912-13. Returned to China, August, 1914. Professor of Mathematics, Tangshan Railway and Engineering College, Tangshan, 1914 to date. Proctor, Tangshan Railway and Engineering College, 1915-16.