Digital data today pours out in immense quantities. How to see and convey the signal? With that in mind, Edward Tufte will soon be speaking in Chicago and in Champaign-Urbana at the University of Illinois’ National Center for Supercomputing Applications. Mr. Tufte is considered one of the masters of conveying information visually. His four books are beautiful and full of examples of ways to convey both meaning and detail. One chart he cites communicates in detail the awful human toll of Napolean’s 1812 march on Moscow. I attended one of the seminars before and think it’s well worth the $ 380 fee, which includes copies of all four books.