Would you be kind enough to check if that version contains anything on calculating the length of the perimeter of an ellipse. Backstory, I was living in London in 1990 and this guy was trying to sell me & girlfriend a set of the E.B. I asked him to show me the article on the length of the perimeter of an ellipse and he ... well, he didn't. Later I discovered that it is a very tricky matter. But I wonder if there is anything in that version that mentions the difficulty.