Again McGee has combined good news about food -- a type of pears being introduced to Americans -- with lots of scientific data about what makes them taste and smell the way they do. He summarizes: "Kuerle pear was developed more than a thousand years ago, and has been valued for its 'super white' flesh, elongated shape, jade green skin, and special fragrance. Substantial quantities are now exported."
I hope I'll find some the next time I shop at Whole Foods. The picture was the only one I found with a google image search.