History[ edit ] The Greek botanist Theophrastus c. In , the German-American Jacob Kuechler — used crossdating to examine oaks Quercus stellata in order to study the record of climate in western Texas. Kapteyn — was using crossdating to reconstruct the climates of the Netherlands and Germany. Douglass sought to better understand cycles of sunspot activity and reasoned that changes in solar activity would affect climate patterns on earth, which would subsequently be recorded by tree-ring growth patterns i. Wood Diagram of secondary growth in a tree showing idealised vertical and horizontal sections.
18 Things Every 18 Year Old Should Know
Dendrochronology - Wikipedia
How to be 18 again ———————— When you turn 18 you are a free man. You can kick off the shackles and go about your life as you wish. But the plan that is likely laid out for you is a plan destined to fail, so you've got to make the right choices to get a jumpstart on a life of health, wealth and happiness. Regrets are pointless, but if for some reason I was put into a time machine and found myself 18 years old again this is what I'd be glad to know. Assuming you are a westerner, especially an American, getting married young will be the biggest mistake of your life. As a young man you can be free to date around and play the field. Tying yourself to one woman with a Government enforced noose will do two things:
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History[ edit ] A few members of the Holy Rollers N. Swedes and Finns , the first European colonists in the Philadelphia area, brought the custom of visiting neighbors on "Second Day Christmas" December 26 with them to Tinicum. This was soon extended through New Year's Day with costumed celebrants loudly parading through the city. By the early 19th century, these coalesced with earlier Swedish customs, including the Christmas neighbor visits and possibly shooting firearms on New Year's Day although this was common in other countries as well as well as the Pennsylvania German custom of "belsnickling," where adults in disguise questioned children about their behavior during the previous year.