Artesian aquifer its recharge zone is at a higher elevation than the head of the well. Artesian wells were named after the former province of Artois in France, where many artesian wells were drilled by Carthusian monks from 1126. Artesian aquifer An aquifer is a geologic layer of porous and permeable material such as sand and gravel, limestone, or sandstone, through which water flows and is stored. An artesian aquifer is a confined aquifer containing groundwater under positive pressure. An artesian aquifer is trapped water, surrounded by layers of impermeable rocks or clay, which applies positive pressure to the water contained within
A Certain Magical Index the first volume of "A Certain Magical Index", according to editor Kazuma Miki, "(to be blunt) it sold like crazy. Shortly after the official release date, we had to do a reprint half the size of the original printing. It was on a Monday. I still remember it now. It was quite an achievement for an unknown newcomer". In May 2010, it was reported that "A Certain Magical Index" became Dengeki Bunko's No. 1 bestseller and it became the first Dengeki Bunko series to sell over 10 million copies. Later that year, it became the fifth best selling light novel