Why not limit the height of the columns so they fit on the screen, and wrap around to new columns lower down? So when you reach the end of the rightmost column,

Why not limit the height of the columns so they fit on the screen, and wrap around to new columns lower down? So when you reach the end of the rightmost column, you scroll down the page and continue reading at the leftmost column. I've experimented with this style on Wikipedia, with separate columns under each headline. It usually works well.