How do I search for?

[jbxx]

I seem to remember that I could do this
once upon a time, but I'll be dammed if
I can remember how.
Here's the problem.
I get on Batlabs, it says that there are 200 new posts.
I start slogging through them, then my internet connection
drops me . When I get back on there are no new posts.
How can I use the search function to find, say, the last
200 posts?
J.B. AD6WX