Mason Jones, principal hornist with the Philadelphia Orchestra during the Ormandy era, died this morning, the orchestra announced. Jones was a star player in many of the recordings that defined the orchestra. He had a combination of refinement and presence that was, until very recently, the unspoken philosophy of the orchestra's horn section. He was also personnel manager - a job that used to go to players rather than administration. His recordings - and especially those with the old Philadelphia Woodwind Quintet - were the reason a lot of players got into the business. He was the quintet's last surviving original member. An obituary will appear in The Inquirer shortly.