Central Park Sprinklers Size:20" x 25" “Swimming Against the Rising Tide

“Swimming Against the Rising Tide

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its lifting gas was changed from hydrogen to helium for safety reasons

Central Park Sprinklers Size:20" x 25" “Swimming Against the Rising TideWith a turn of a ceremonial key, Park Commissioner Walter R. Herrick demonstrated the newly installed sprinklers throughout Central Park on December 8, 1928. The Times reported that the pipes of the new irrigation system, which have "concealed spray heads," will be controlled by a timer and create a fine mist. "Its operation starts with an electric clock which turns the system on or off at the given time." The system was estimated to do in 10 minutes