body.logged-in div.islandora-newspaper-object div.vertical-tabs-panes.vertical-tabs-processed{ 
    position: sticky; top: 3em;
    }
/*top: 3em accommodates the admin toolbar at the top of the page; without it, January isn’t visible*/
    
body.not-logged-in div.islandora-newspaper-object div.vertical-tabs-panes.vertical-tabs-processed{ 
    position: sticky; top: 0em;
    }