Page:Climatic Cycles and Tree-Growth - 1919.djvu/135

DOUGLASS ⁠ PLATE 12

DIFFERENTIAL PATTERNS.
a. Sunspot Nos. 1610-1910 at 11.4. b. 57 European trees, 1830-1910 at 11.4. c. 80 European trees, 1800-1910 at 11.4. d. South Sweden, 1830-1910 at 12.0. e. Vermont group, 1650-1910 at 11.3. f. Flagstaff group, 500 years at 11.4. g. Flagstaff group at 23.5 years. h. Norway, 1740-1910 at 23.8 years. i. Austria, 1830-1910 at 22.0 years.	j. Norway, N-2, 400 years at 33.0. k. Vermont, 250 years at 32.5. l. Sweden, 1740-1910 at 37.0. m. Sequoia, 1300-250 B.C. at 33.0. n. Flagstaff, 500 years at 33.0. o. Sequoia, 3200 years at 101. p. Flagstaff, 500 years at 120. q. Standard 5-year period at 5.0 years. r. 5 to 10 year logarithmic variable period at 8.0.