How to get articles from a given position from the Google Feed API?

Question

Google

Google provides a wonderful tool for aggregating news feeds. I request a feed from him using the google.feeds.Feed() method and get the last 4 posts. There is a feed.setNumEntries() method that allows you to get up to 250 posts. I want to get 25 posts, but not from the first position, but, for example, from the 50th one, to load 25 posts at a time.
Who fumbles - tell me how you can implement this without initially downloading 250 posts?

Answer 1

It looks like nothing, and here's why:
10:00:01 we pick up a feed of 50 records at position 50:100
10 publications occur in the feed
10:00:06 we pick up a feed of 50 records at position 100:
150