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 Girl Browne on backing vocals. "A Certain Girl" was recorded by The Yardbirds. It is a track from their 1965 LP, "For Your Love". The song features Eric Clapton on guitar. A Certain Girl "A Certain Girl" is a 1961 song by Ernie K. Doe. It was a double-sided hit as the B-side of "I Cried My Last Tear" (U.S. #69). "A Certain Girl" also charted, reaching number 71 during the fall of that year. The single was the only release from his final album. Warren Zevon covered "A Certain Girl" in 1980. It was released as a single from his