Cross dating in dendrochronology douglass

The student learns many facts and has much training.He can only dimly see which fact and which training will be of eminent use to him, but some special part of his education will take root in him and grow and pay for all of the effort which he and his friends have put into it. In this Observatory I sincerely hope and expect that the boundaries of human knowledge will be advanced along astronomical lines.During this period Douglass served the University of Arizona as Head of the Dept.

cross dating in dendrochronology douglass-88

They produced a floating chronology of 585 years for Southwestern ruins, and extended Douglass's Flagstaff chronology of Ponderosa Pine, which was 500 years long in 1914, to A. In 1929 Douglass set out on a third Beam Expedition, explicitly targeting samples that would potentially bridge the gap between the two chronologies. Over 15 years after he began working with Clark Wissler, Douglass had bridged the gap and, as a result, had a continuous record of tree-ring data dating back to A. Cliff dwelling at Tsegi Canyon, Mesa Verde, and Canyon de Chelly dated back to the 13th century. He wrote: Its inner rings overlapped the late decades of the old chronology by 49 years, the final ring resting on the year 537 of that sequence; its outer ones overlapped the earliest 120 years of the new, the last one reaching to 1380.

Finally, on June 22, 1929, a beam labeled HH-39 was extracted at the Show Low site in Arizona. It was determined that Aztec Ruin was constructed during a period ranging from A. Thus the 26 years from 1260 to 1286, which belonged to both chronologies, were definitely matched and their union confirmed by HH-39, which in American archaeology is destined to hold a place comparable to Egypt's Rosetta Stone…With careful archaeological study we shall perhaps be able to trace the movement of clans and test tribal traditions which have been so often quoted as the early history of these people (Douglass 1929: 770).

On October 18, 1916, University President Rufus von Klein Smid announced that an anonymous donor had given the University US$60,000 "...

to be used to buy a telescope of huge size"; the donor was later revealed to be Mrs.

Almost immediately upon his arrival in Tucson, Douglass re-established his astronomical research programs using an 8-inch refracting telescope on loan from the Harvard College Observatory and actively began to pursue funding to construct a large research-class telescope in Tucson.

Over the next 10 years Douglass was unable to secure funding from the University and the Arizona Territorial (and later State) Legislatures.

In 1916 Douglass began obtaining and analyzing archaeological samples first collected during an expedition to northwest New Mexico by the University of Colorado and the American Museum of Natural History.

In April 1918 Wissler asked Douglass whether or not it would be possible to assign relative dates to samples that could not be dated absolutely.

Lavinia Steward of Oracle, Arizona, a wealthy widow with an interest in astronomy and a desire to commemorate her late husband, Henry Steward.

Douglass made plans to use the Steward gift to construct a 36-inch Newtonian reflecting telescope.

Scientific research is business foresight on a large scale. Knowledge is power, but we cannot tell which fact in the domain of knowledge is the one which is going to give the power, and we therefore develop the idea of knowledge for its own sake, confident that some one fact or training will pay for all the effort.

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