WALLER, Frank, artist, born in New York city, 12 June, 1842. During 1863-'8 he was engaged in business in New York. In 1870-'1 he studied under John G. Chapman in Rome. The following year he travelled in Egypt with Edwin White, making many studies and sketches for future works. He was one of the founders in 1875 of the Art-students' league, of which he was also the first president, and for which he wrote " Report on Art Schools" (New York, 1879). His paintings include "Tombs of the Caliphs" (1874) ; "Interior of my Studio ; "Caravan on the Desert" (1878) ; " Interior of Metropolitan Museum of Art " (1879); '" Temple of Kom Ombos" (1881) ; " Eventide, Venice" (1883) ; "Testing his Toledo" (1884) ; and "Hop-Picking" (1885). Of the last three he has also made etchings. He has adopted architecture as a profession, and now devotes his attention principally to that art.--His brother, Elwyn, chemist, born in New York city, 22 March, 1846, was graduated at Harvard in 1867, and at the Columbia school of mines in 1870, with the degree of engineer of mines. In 1871 he became an assistant in the department of analytical chemistry in the School of mines, in 1871 he became an instructor, and since 1885 He has been professor of analytical chemistry. He was appointed assistant sanitary inspector on the New York health board in May, 1872, and in 1875 became its chemist, which place he filled until 1885. The degree of Ph.D. was conferred on him for post-graduate researches by Columbia in 1875. He is a member of various scientific bodies and a fellow of the London chemical society. Dr. Waller was connected editorially with "The American Chemist." and has contributed articles on water, food, and sanitary and analytical chemistry to scientific journals. The chapter on "Disinfection" in Buck's "Treatise on Hygiene" (New York, 1879), and that on " Water " in Parkes's "Manual of Practical Hygiene" (1883), were written by him. He has edited Cairns's "Manual of Quantitative Analysis" (New York, 1879), and has contributed a "Report on Butter" to the New York state dairy commissioners' report published in 1885.