Why the wider spread of dates for the Shroud of Turin then for the control samples? This chart is from a new text book, An Introduction to Archaeological Chemistry, Price, T. Douglas, Burton, James H., 1st Edition., 2011 (Springer-Verlag, New York, September 2010). In case you thought of popping out to your corner bookstore, the price at Amazon is $169.00. (You can read one chapter, online, for $25.00).