Web tip: For a mesmerizing, interactive image of a 1908 painting of waves click here. If you move your cursor across it, the image slides between the painting and a modern photograph taken from a vantage point to duplicate it. The site has several such images. I chose this one because it reminded me of Charlie Post’s Wave, but scroll down the page and try some others. A time sink, but fun. (With thanks to the Gurney Journey.)