Anthony RavielliAnthony Ravielli, a book illustrator and author, died on Jan. 9, 1997, at the age of 86. Mr. Ravielli began as a portrait painter before turning to illustration. He worked in advertising and did magazine covers. His illustrations appeared in more tha 100 books, including ''The Relativity Explosion'' by Martin Gardner and ''Men, Microscopes and Living Things'' by Katherine B. Shippen. His own books for children include ''Elephants: The Last of the Land Giants'' and ''Wonders of the Human Body.'' Read More Read Less