21. The millpond may have had various sources, including water in Calver sough extracted from the mine. 22. He built a ballroom on the second floor of the establishment and a sulky racetrack around his millpond . 23. A sufficient head of water to power the mill was created by a weir system and a millpond . 24. It was burnt down during the 19th century and all that remains of its existence is the millpond . 25. This increased efficiency made steam power more economical than water power, allowing industrial development away from millponds . 26. Next to the road is a large millpond fed by the Goldstone Brook, with a derelict waterwheel. 27. Since dropping items out of airplanes is an inexact science at best, some boxes landed in the millpond . 28. This Four C Mill used the lake that is the heart of Ratcliff Lake Recreation Area as its millpond . 29. When the tides flowed out of the Hackensack River, the tidal millpond was slowly released through the waterwheel. 30. On 16 April 1961, the Millpond A-26 pilots were commissioned into the Royal Lao Air Force.