What does in any measure mean in that sentence?We have before observed, that there is generally in Nature something more Grand and August, than what we meet with in the Curiosities of Art. When therefore, we see this imitated in any measure, it gives us a nobler and more exalted kind of Pleasure than what we receive from the nicer and more accurate Productions of Art. On this Account our English Gardens are not so entertaining to the Fancy as those in France and Italy, where we see a large Extent of Ground covered over with an agreeable mixture of Garden and Forest, which represent every where an artificial Rudeness, much more charming than that Neatness and Elegancy which we meet with in those of our own Country. (Addison. Spectator, no 413.) [Project Gutenberg.org]
From the context, I'd say it means to any extent whatsover.
But I'm not sure. It could be to a certain extent, too.