I’ve never tested it, but there are days when it feels like my p.s.i. is on the low side.
Published by Mark Heath
I'm a freelance cartoonist. My work has appeared in Reader's Digest, Harvard Business Review, American Scientist, Woman's World, and others. I'm also the creator of Spot the Frog, a comic strip you can find at Gocomics.com. View all posts by Mark Heath