Can someone pls tell me what is seltzer water


In article >,
wrote:
>That is, yeast is a tricky thing, it takes days to brew your own, and
>the recipe I tried wasn't great, so here's something different for
>those who like the taste of ginger beer.
>
>Stir till dissolved:
>
>1/2 to 3/4 cup brown sugar
>
>1 tsp. powdered ginger
>
>1/2 cup cider vinegar
>
>Add:
>
>I quart cold seltzer water.
>
>(This is the recipe from Barbara Walker's "The Little House Cookbook."
>Only difference is, Laura didn't have access to seltzer water, so she
>just used cold well water.)
>
>Lenona.
>
>