National Geographic : 1929 Dec
A CROSS-SECTION OF A DOUGLAS FIR LOG THAT HELPED MAKE HISTORY In the search for beams that would tie together the tree-ring stories of Pueblo Bonito timbers and thoseofliving trees, this one found inBetatakin Ruin (see text, page 750, and illustration, page 759), proved to be a missing link that bound the 586 years of theprehistoric chronology together. Its rings show that it started its career in 1073 and was felled A. D. 1260. Photographs byDr.E.F.Carpenter A TIMBER TALE OF FAT YEARS AND LEAN This is an enlargement of a 3/-inch core cross-section of a beam taken from the old house at Oraibi (see, also, illustration, page 746). In the thin group of rings at the left center is revealed the story of the tree's hardships during the great drought between 1276 and 1299 (see text, pages 742 and 754).