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Dendrochronology or tree-ring dating is the method by which timbers are precisely dated through measurement and analysis of the trees’ ring width.The variation in the tree-ring width, influenced by the annual climate variation during the trees’ growth, is the code used in dendrochronology.Tree rings: each ring represents one year's growth.A good year for growth will be recorded by a wider ring in all trees affected, whatever their age, like an annual date stamp.Dendrochronological cross-dating against the master chronology showed that the rings of the panel represent the period 1413–1620.Cross-dating was attained by comparing the tree ring series of the panel painting with the previously published chronologies obtained from timber transported from the historical ports of the Eastern Baltic Sea to Western Europe.

The rings in a non-living specimen can be counted to determine the number of years the specimen spans.

The following article is abstracted from The Biblical Chronologist Volume 5, Number 1. The science of constructing chronologies from tree rings is called dendrochronology. Modern trees are known to produce one growth ring per year. (The idea that ancient trees grew more than one ring per year will be discussed below.) Therefore, by coring a living tree and counting rings from the present backwards, it is possible to determine the year in which each ring grew. The bristlecone pines in the White Mountains of California live to extremely old ages, some in excess of 4,000 years.

The University of Arizona dendrochronology lab sports a (no longer living) specimen which contains over 6,000 rings.

Photography appears as a promising method to be used for dendrochronological investigations of archaeological and historical objects, alongside the conventional methods.

We note that the importance of using photographs of tree ring cross sections was highlighted already in the 1930s.

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Walks across York’s Wiggly Bridge on York River or along the Cliff Walk are great ways to explore York’s waterfront and coastline. The 1879 Nubble Light is the focal point of Cape Neddick, the most photographed lighthouse in the country arguably.

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