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
FTV-1126 orbit, it was assigned the Harvard designation 1962 Sigma 1. FTV-1126 was operated in a low Earth orbit, with a perigee of , an apogee of , 82.3 degrees of inclination, and a period of 93.75 minutes. The satellite had a mass of , and was equipped with a frame camera with a focal length of , which had a maximum resolution of . Images were recorded onto film, and returned in a Satellite Recovery Vehicle, before the satellite ceased operations. The Satellite Recovery Vehicle used by FTV-1126 was 582. Once its images had been returned, the inactive FTV-1126 decayed