TREE RECORDS! LENGTH 59 



sent to Tucson, and later (July 13, 1926) he showed me the stump, 

 of which I include here a photograph (Plate 6, B). The canyon is 

 about 200 feet deep in the horizontal limestone strata and extends 

 north and south. Water flows occasionally. The stump is on the 

 east side of the canyon, 25 feet above the bottom and 50 yards from 

 the usually dry wash. The slope of ground about it is about 30°. 

 The date of starting was undoubtedly close to 1275 a. d. The earliest 

 measured ring is 1284, but a serious injury occurred, probably in 

 1294, greatly reducing the growth for some 8 years. Much decay has 

 occurred at this point, and though the dating is probably correct, the 

 normal values of the ring-width are profoundly reduced. Since the 

 first hundred years in this record were new, three radii were measured 

 and the average taken. The growth is somewhat complacent, but 

 much information is given by it for that century. It is probable that 

 important checks on it will be obtained from early historic beams in 

 the Hopi pueblos. This discovery renewed interest in the search for 

 very old trees, and it is possible that some living trees of similar age 

 have already been found. 



Other 500-year pines — A 500-year pine was found in the group 

 of 8 from the Charleston Mountains, near Las Vegas, Nevada. It 

 showed with the other trees there a record rather intermediate between 

 the Arizona and California values. Also a fine v-cut from a pine stump 

 in the Crater National Forest of southern Oregon near Kirkford has 

 been sent me by the kindness of Lumberman John D. Hoist, of that 

 locality, acting for Mr. Fred Ames, assistant district forester at the 

 Portland, Oregon, office. In this connection, also, one might mention 

 the extraordinarily old juniper near Logan, Utah, of which a descrip- 

 tion has come from Supervisor C. B. Arentson, located there. 



PREHISTORIC MATERIAL 



The search for old pine records has taken a new turn in the use of 

 early historic and prehistoric pine logs in the Hopi villages and the 

 ancient ruins of the Southwest. This really began in 1916, when Mr. 

 Earl H. Morris, for the American Museum in New York, sent me 

 several early historic logs from Gobernador Canyon, near Aztec, New 

 Mexico. This led to a series of specimens from the ancient ruin at Aztec. 



Aztec sections — A trip to Aztec was made in August 1919. An 

 examination of the logs in this ruin led to the construction of the 

 tubular borer, which produces cores 1 inch in diameter, giving the 

 series of rings from the outside to the center of the log without impair- 

 ing its strength and without disturbing the original house construction. 

 Following this visit, Mr. Morris spared no effort in getting me speci- 

 mens from some 50 logs used in the construction of that wonderful 

 ruin. Nearly all of these cross-identify perfectly in the Aztec-Pueblo 



