William Pitt Mason. Pioneer in Sanitation Engineering. . William Pitt Mason (1853-1938). C.E. degree, RPI (1874)M.D., Albany Medical College (1881)Assistant Professor of Chemistry, RPI (1882)Professor of Analytical Chemistry, RPI (1885)Head of Chemistry Department, RPI (1895)LL.D., Lafayette College (1908)Head of *newly formed* Chemical Engineering Department, RPI (1912)Doctor of Science, Union University (1917)Member, APHA, 28th president of AWWA.