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| Keywords: Climatic Cycles and Tree-Growth Plate 12.jpg en 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 1919 Climatic Cycles and Tree-Growth Andrew Ellicott Douglass PD-old-100 Climatic Cycles and Tree-growth Solar cycles | ||||
