The Histomap of Evolution is a poster from my collection, by John B. Sparks, published by Rand McNally & Company in 1932. Measuring 57cm x 1.5 meters (21.5 x 59 inches), it was a graphical representation of the history of the earth, drawn on a logarithmic scale, covering a period of 10 billion years.
http://www.lessthanevolved.com/histomap ... ution.html
