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.
Well, the last total solar eclipse on the March equinox occurred back in 1662 on March 20 th. There was also a hybrid eclipse â an eclipse which was annular along a portion of the track, and total along another â on March 20 th, 1681.