NEW YORK - News Corp. is placing more bets on the future of electronic reading devices and the idea of charging readers for online content.

Rupert Murdoch's media conglomerate says it is buying Skiff LLC, a company started by magazine and newspaper publisher Hearst Corp. to create a technology platform for e-readers.

News Corp. is also making an investment in Journalism Online LLC, which is developing technology to help publishers collect payments from readers for online material.

Financial details were not disclosed.

Both fledgling ventures are seeking ways to support journalism at a time when publishers are struggling to find ways to be as profitable online as they once were in print.