I have seen a lot of drink recipes call for Schweppes Russian, but I
have never heard of that and can't seem to find any information about
what it actually is or contains.

My question is twofold:
a) What is Schweppes Russian (and is it different from regular tonic
water)?
b) How can I obtain some? I live in Seattle.

Hello jackih-ga,

An alternate spelling may be “Schweppes Russchian”.

Take a look at the following links:

Rob's Coke Room
http://www.angelfire.com/mi2/CokeRoom/aroundtheworld/global/greatbritain.html

Sasky.com
http://www.sasky.com/saskycom/databases/non_alcoholic/cold/carbonated/mixers.html

The British Connection
http://www.thebritconnection.com/what.html

Googlenut

Its taste has been described as "bitter peaches". Check the first two
search results here:
http://groups.google.co.uk/groups?q=russchian+peach+OR+peaches&ie=UTF-8&oe=UTF-8&hl=en&btnG=Google+Search

While ordering my groceries (in the UK) I found that Russchian is not
included with the tonic waters, but listed under 'other mixers'.
http://www.tesco.com/superstore/

Hope this helps!

Leli