Acknowledgements

We really must thank a lot of people for helping us out with this project. A few of those, who have contributed data, samples and time are Doug Larson and Pete Kelly from the University of Guelph, Henri Grissino-Mayer at the University of Tennessee and Fred Breglia of the Landis Arboretum. Finally, we thank the many landowners across a large portion of eastern US who let us camp, cook, cut and core on their property,