How do I download pages that load more items onto the screen when scrolled
down? The pages I am trying to download are Google+ community pages (ex.
<https://plus.google.com/communities/115289327252145741560>). 

If I can't do this, is there a way to download the individual posts in them
(which can be accessed on separate webpages)? Each post url is "/post/ID"
preceded by the community link.