Our unpaid British correspondent, Martin Hugh-Jones, of Baton Rouge, says our climate (and the way it's dealt with) differs from that of his home isle. He imagines this conversation: "'How and when do you know someone lives in southern Louisiana?' "'Good question. How?' "'They wear a sweater in summer.' "'Oh.' "'The air conditioning is arctic.'" "When I read on Friday about the rats at LSUNO, I almost fell out of my chair!," says David Muller, of Folsom.