PERSONALS Edgar M. Hoopes, Jr., has been appointed engineer of the water department of Wilmington, Del. Walter E. Lee, one of the city engineers of Baltimore, Md., has been appointed water engineer by the mayor. Mr. Lee succeeds Mr. Ezra B. Whitman, who resigned to go into business for himself. Myron L. Fuller, a specialist on ground water supplies, has returned from China, where he has been engaged in explorations for nearly two years, and will resume his consulting practice on ground waters, dam-foundations, etc. His headquarters are at the Bureau of Associated Geological Engineers in Boston, Mass.