As the chorus calling on public media to add more local journalists grows, let’s be mindful of the specific ways adding journalists can dramatically improve local public service. Just by enlarging its newsroom to four, five or six journalists, a station will gain the human wherewithal to unleash a proper beat system. Beats cause reporters to become specialists. With a news staff of six, for example, a newsroom could have reporters well versed in the actors, history and nuances of a starter set of beats — education, health, business, law, environment and arts/culture. These specialists are more likely to break original stories, to know when it’s important to follow up, and to extract meaningful news analysis from a week’s events.