Giavanni Schiaparelli

	Oppositions of 1877, 1879 and 1882
	Observed linear "canali"   The Canali in 1877 The Canali in 1879
	Did he mean "channels" or "canals?"

Percival Lowell

	Opposition of 1894 The Canals in 1894 No visible oceans!  (? !!) and seasonal variations Dry planet Canals were for irrigation (? !!)
	The Current view