A scholarly look at the digits that matter.

by Nick Norlen

Running Numbers is short-stacked: two short notices, a short hair solution, a short joke, and an event sure to please my shorty. You sort it out.

4 Number of Philadelphia museums — Independence Seaport Museum, National Constitution Center, African American Museum in Philadelphia and Philadelphia Museum of Art — where Bank of America customers can present their card for free admission through May 31. So that's the plan, BoA — get 'em hooked, pull the plug, and watch 'em put the admission on plastic during prime museum season? Devious.

4 Number of Philly comedians who will join Dave Praeger, author of Poop Culture: How America is Shaped by its Grossest National Product, at the Fleisher Art Memorial, 719 Catharine St., June 2 at 7:30 p.m. for "an evening of history, cultural analysis, and ... cringe-inducing bathroom stories." Admission is $5, but I'm hoping TP will be free.

5 Height in feet — give or take an inch — of Danny DeVito, who will appear at the Bryn Mawr Film Institute June 10 for a Q&A following the screening of Hoffa and The War of the Roses. Despite DeVito's involvement, these are not short films. The event runs noon to 6 p.m. Visit www.brynmawrfilm.org for details and tickets.

100,000 Average number of hair follicles on a human head previously thought to be unable to regenerate. A recent study by University of Pennsylvania researchers published in the journal Nature shows that new hair cells were able to be grown on the skin of mice, raising possibilities for baldness treatment. See, DeVito? Things aren't so bad.

$10,500,000 Goal of the Archdiocese of Philadel-phia's 2007 Catholic Charities Appeal, which ends May 31. Short notice or not, I'm guessing Rigali will take a check after deadline.

Can I get your digits? I want to hear about the numerals you need to see. Let a number runner know at runningnumbers@gmail.com.