The city has twenty or more hospitals for the care of its sick, injured, or insane, ten of which have schools for the training of nurses. There is the Western Pennsylvania Institute for the Instruction of the Deaf and Dumb in Pittsburgh, which is in part maintained by the State, where trades are taught as a part of the educational system. The State also helps to maintain the Western Pennsylvania Institution for the Blind, the Home for Aged and Infirm Colored Women, and the Home for Colored Children. Among other charitable institutions maintained by the city are the Home for Orphans, Home for the Aged, Home for Released Convicts, an extensive system of public baths, the Curtis Home for Destitute Women and Girls, the Pittsburgh Newsboys' Home, the Children's Aid Society of Western Pennsylvania, the Protestant Home for Incurables, the Pittsburgh Association for the Improvement of the Poor, and the Western Pennsylvania Humane Society for the Prevention of Cruelty to Animals, Children, and Aged Persons. Under the management of Women's Clubs several playgrounds are open to children during the summer, where competent teachers give instruction to children over ten years of age in music, manual training, sewing, cooking, nature study, and color work. The water supply of Pittsburgh is taken from the Allegheny River and pumped into reservoirs, the highest of which is Herron Hill, five hundred and thirty feet above the river. A slow sand filtration plant for the filtration of the entire supply is under construction and a part of it is in operation. In this last year the Legislature has passed an act prohibiting the deposit of sewage material in the rivers of the State, and this tardy action in the interest of decency and health will stop the ravages of death through epidemic fevers caught from poisoned streams. VI Pittsburgh maintains by popular support one of the four symphony orchestras in America. She has given many famous men to science, literature, and art. Her astronomical observatory is known throughout the world. Her rich men are often liberal beyond their own needs, particularly so William Thaw, who spent great sums for education and benevolence; Mrs. Mary Schenley, who has given the city a great park, over four hundred acres in the very heart of its boundaries; and Henry Phipps, who erected the largest conservatory for plants and flowers in our country. There is one other, Andrew Carnegie, whose wise and continuous use of vast wealth for the public good is nearly beyond human precedent. [Illustration: Zooelogical Garden in Highland Park]