[Mediawiki-api] Getting more than 50 diffs of older revisions

[randomcoder1 at gmail.com]

I'm searching for a way to get diffs of revisions starting from some 
date and limiting the number of results.
Or getting all the diffs starting from the current one to the oldest one.
The revisions are in pairs diff(Newest,AlmostNew) , 
diff(AlmostNew,AlmostAlmostNew) ... and so forth.
action=history seems to be doing by default for the first 5 
http://en.wikipedia.org/w/index.php?title=Language&feed=rss&action=history
I also found a way to get the first 50
http://en.wikipedia.org/w/index.php?title=Language&feed=rss&action=history&limit=50
But can I get them all ? Can I get all the diffs ?
Or diffs starting from a date ?

Thank you