1. Proj. Engr.; Brown and Caldwell, Consulting Engrs., San Francisco, CA
2. Dir., Sanitary Engrg. Research Lab., and Prof. of Sanitary Engrg.; Univ. of California, Berkeley, CA
3. Assoc. Prof. of Sanitary Engrg. and Chf. Chemist, Sanitary Engrg. Research Lab.; Univ. of California, Berkeley, CA