gaseous ammonia is generally referred to as anhydrous ammonia to distinguish it from household ammonia, which is an ammonium hydroxide aqueous solution. gaseous hydrogen chloride is generally referred to as anhydrous to distinguish it from the more commonly used 37% w/w solution in water.
20th century. The total solar eclipse of June 8, 1918 crossed the United States from Washington State to Florida. This path is roughly similar to the August 21, 2017 total solar eclipse and was the last time totality crossed the nation from the Pacific to the Atlantic.
The solar eclipse of August 12, 2045 will have a very similar path of totality over the USA, about 400 km (250 mi) to the southwest, also crossing the USA's Pacific coast and Atlantic coast; however, duration of totality will last over twice as long.