TREE RECORDS: GEOGRAPHICAL DISTRIBUTION 91 



Grant Park sequoias (GPS) --This group includes the 21 v-cuts 

 made in 1915 and 1918 in the vicinity of the General Grant National 

 Park. They are described in Volume I. 



Topography sequoias (TS) — These are 12 small and usually 

 incomplete radials collected in 1919 from the Grant Park region, 

 giving the last 500 years of sequoia growth and selected with respect 

 to topographic contours, ground-water, and so forth, to get the effect 

 of these features on the size of rings. 



Springville sequoias (SS) — These include two numbers, 22 and 23, 

 collected in 1918, and 14 radials secured in 1925 from medium and 

 very old trees at the old Enterprise mill-site some 20 miles east of 

 Springville, California. These will be used especially in the formation 

 of early tree-records and the attempt to date the prehistoric ruins of 

 the Southwest. 



COAST REDWOODS 



Santa Cruz group (Z) — These are eight radial pieces of coast red- 

 wood collected February 20, 1921, some 15 miles north of Santa Cruz, 

 California. These could not be cross-identified and so are not dated. 



Scotia group (B) — These are 12 fine radials collected in early July 

 1925, at Percy J. Brown's lumber-mill, a few miles south of Scotia, 

 California. These, too, did not cross-identify and have never been 

 dated. 



ARIZONA GROUPS 



Flagstaff century group (FLC) — This includes 10 pines 500 years 

 old, of which one extends back 640 years, all in the vicinity of Flag- 

 staff. These will form the approach to the study of early pine records 

 in the Southwest, which will include many semihistoric beam sections 

 from the Hopi villages, and it is hoped from the prehistoric ruins also. 



Flagstaff lava-beds (FLB) — These lava-beds are 16 miles northeast 

 of town. Only two trees belong in this group, FL 48, inside the ring 

 of lava, from which a 1-inch core was taken in 1920, and FL 51, just 

 outside the lava ring, a v-cut from the stump. The former goes back 

 to 1556 and the latter to 1598. 



Prescott group (PR) — Nos. 1 to 70 were small incomplete v-cuts 

 sent me by the Forest Service in 1911, described in Volume I. Nos. 

 71 to 75 are increment-borings made in 1924 to bring the Prescott 

 rain comparison up to date. The records were not intended to go back 

 before 1850, but some of them do. 



OTHER WESTERN GROUPS 



Pecos, New Mexico (L) — These are four radials from the forest 

 near Pecos, New Mexico, sent by the Forest Service in 1920. They 

 were needed for comparison with the prehistoric beams sent by Dr. A. 



