CROTON WATERSHED

the area from which New York City receives about half of its water supply. The old aqueduct of this name stretched from Croton Lake to the city, a distance of about 30 miles, and was built of masonry, lined with brick, in 1842. It was able to convey about 72,000,000 gallons of water a day, its cro -section area being 5314 square feet. In the eighties the need for increasing the city’s water supply became imperative, and in 1890 the new Croton Aqueduct was finished. It is an enclosed waterway of masonry, lined with brick and, in places, with steel, with a cro section area of 15514 square feet, or about twelve feet in diameter, capable of conveying 300,000,- 000 gallons a day. Its total length is 3034 miles, stretching from the Croton Dam to 135th St., New York, where a gatehouse distributes the flow through 12 lines of 48 inch pipes, four of which enter Central Park lReservoir. The aqueduct lies almost entirely underground, having been blasted out of solid rock, except for a few blowouts, where it rises above ground, where the flow may be diverted in case of emergency. Pa ing under the Harlem River the diameter of the aqueduct narrows to ten feet, the water being forced through by pre ure. In 1906 a new dam was constructed at Croton Lake, to further increase the available water supply. ancient Gk. town, E. of Lucania, Italy; founded by Achzans, 710 B.C.; residence of philosopher Pythagoras; modern Cotrone. I so crotonic acid is an oil (B.P. c. 172°), and methacrylic acid crystals (M.P. 16°, B.P. c. 160°) are isomeric acids