What does "seidlitz" mean?

Seidlitz: Of or pertaining to Seidlitz, a village in Bohemia. [Written also Sedlitz.] Seidlitz powders, effervescing salts, consisting of two separate powders, one of which contains forty grains of sodium bicarbonate mixed with two drachms of RochellRochelle powders. -- Seidlitz water, a natural water from Seidlitz, containing magnesium, sodium, calcium, and potassium sulphates, with calcium carbonate and a little magnesium chloride. It is used as an aperient.