Dendro-Drill

The photo shows a drill used to collect tree cores for dedro-studies. This photo was taken in a small Rustico in the Calanca Valley. The aim of the small student project was to date the big trunk of the Rustico, to have an estimated construction year. However, as there were only around 50 year rings, the cross-dating was difficult and the results not very meaningful.
by Valentino Känzig