Focus on Bailey Fountain and analyze the Electric Fountain.
The 1897 Electric Fountain replaced the 1873 fountain and was controlled by 2 operators during scheduled night exhibitions on Wednesdays and Saturdays with audiences up to 30,000. A Brooklyn Park Commissioner's initial plan for a single spout was superseded by Fredric W. Darlington's design, which was presented in May 1897 to the Park Commission.  Wilson & Baillie Manufacturing built the fountain, and the commission's "consulting engineer" was C. C. Martin.  Landscape architect Frederick Law Olmsted placed the fountain at the intersection of two broad paths arranged as a Georgian cross within grassy, treeless plots at the quadrants. The "first exhibition" contracted for July 4, 1897, was delayed until August 7 and attended by "fully 100,000 people".The 6,000 candela "automatic focusing arc lamps" were wired in 3 series circuits for dimming, could each be moved 2 ft (0.61 m) within "silver parabolic reflectors" to narrow or widen the 19 beams, and were positioned in concentric rings around a central light.  The lights extended into glass cylinders protruding through the underwater ceiling and were each beamed through switchable disks of colored gels into water jets (there was also a lighted central geyser).  The ~2,000 nozzles included umbrellas, ball sprays, wheat sheaves, rings, fans, funnels and whirligigs; with many of the nozzles around the lamp housings.  An underground control room on the south of the basin allowed the lighting and hydraulics operators to view through three closely spaced windows in the basin wall 6 in (0.15 m) above the pool surface. A pump recirculated up to 100,000 gallons per hour from the pool in the 120-foot-diameter (37 m) basin.  The fountain also had 88 incandescent lamps on the inner edge of the basin's concrete coping, and the Brooklyn Heights and the Nassau Electric railroads donated the electricity.
The 1915 construction of the New York City Subway's IRT Eastern Parkway Line (2, ​3, ​4, and ​5 trains) and BMT Brighton Line (B and ​Q trains) under the plaza left no room for the required infrastructure for the Electric Fountain, which was removed.
New York City Brooklyn Heights Frederick Law Olmsted BMT Brighton Line New York City Subway arc lamp Brooklyn Fredric W. Darlington whirligig New York left Nassau Electric Darlington's candela Electric Fountain disks of colored gels IRT Eastern Parkway Line Georgian cross Fountain