A substance is anhydrous if it contains no water, for example, salts lacking their water of crystallisation. The way of achieving the anhydrous form differs from one substance to another.
A partial solar eclipse at its peak at 3:37 p.m. in Mesa on Oct. 23, 2014. The eclipse was visible over most of North America and covered 44 percent of the Arizona sun. Michael Chow/The Republic.
Other major solar eclipses occurred in the region in the years 248, 301, 317, 342, and 370 AD. The total solar eclipses of April, 218 AD and February, 342, are shown to have occurred directly over the Nazca lines according to Theodore von Oppolzers charts of solar eclipse tracks.