Medieval technology that its potential was fully achieved. Artesian well (1126) A thin rod with a hard iron cutting edge is placed in the bore hole and repeatedly struck with a hammer, underground water pressure forces the water up the hole without pumping. Artesian wells are named after the town of Artois in France, where the first one was drilled by Carthusian monks in 1126. Central heating through underfloor channels (9th century) In the early medieval Alpine upland, a simpler central heating system where heat travelled through underfloor channels from the furnace room replaced the Roman hypocaust at some places. In Reichenau
A Certain Scientific Railgun ending theme is "Real Force" by Elisa. "Only My Railgun" appears in Konami's arcade music games "Pop'n Music 20: Fantasia", "Dance Dance Revolution X2" and "Jubeat Knit". For the OVA, the opening theme music is "Future Gazer" by fripSide, the single of which was released on October 13, 2010, while the ending theme is "Special One" by Elisa, the single of which was released on October 27, 2010. For "A Certain Scientific Railgun S", it has six pieces of theme music, two opening themes and four ending themes. The first opening theme is "Sister's Noise" by fripSide and the first