An improvement less obvious to the eye, but more essential to health, was the installation of a complete sewer system. As the sewage is not allowed to taint the water of the lake, it is carried by pipes to a disposal plant at the lower end of the ground and chemically purified. The water rendered as clear as crystal is then permitted to run into the lake, while the sludge is pressed by machinery into cakes used as fertilizer. An artesian well on high ground supplies pure water in abundance, with taps at convenient places for families. Originally the water in use came from wells. These were carefully tested by scientific experts, and most of them were condemned, but a few were found to give forth pure water and are still in use, though frequently and carefully tested. Near the Men's Club is a spring of mineral water containing sulphur and iron. It has the approval of chemists and physicians, and many drink it for its healthful effect. One who looks over the programs of Chautauqua through successive years will notice the number of the clubs for various classes and ages. Largest of all is the Woman's Club, of which Mrs. Emily Huntington Miller was the first President, succeeded by Mrs. B. T. Vincent, and carried on under her leadership for many years. When on account of failing health Mrs. Vincent felt compelled to resign her office, her place was taken by Mrs. Percy V. Pennybacker of Texas, who had been President of the General Federation of Woman's Clubs in the United States. This Club includes more than two thousand members, and its daily meeting in the Hall of Philosophy brings together a throng, often too large for the building. In 1918 the Club purchased a cottage fronting on the lake, near the Hotel Athenæum, as a headquarters, a place for social gatherings and rest rooms for women. Besides the Women's Clubs and the Men's Club, there are at least a dozen other associations of people having tastes and interests bringing them together. We will name the most important of these without regard to their chronological order. There is the Athletic Club for men and boys over sixteen, directing the organized sports and providing all forms of out-of-door recreation. It has a club house on the lake with bowling alleys and boat room, shower baths and lockers, and a reading room. The Golf Club has a nine-hole course, situated on the rising ground of eighty acres opposite the traction station. The money has been contributed for a Country Club House, soon to be built at the entrance. The donors, it is understood, are Mr. Stephen J. Munger of Dallas, Texas, one of the Trustees, his wife, and Mrs. Frank B. Wilcox of St. Petersburg, Florida, in memory of her husband.