MAKE A MEME View Large Image Climatic Cycles and Tree-Growth Plate 9.jpg en Plate 9 A Periodogram of the sunspot numbers 1755-1911 Corrugations show periods The numbers give length of period in years The white line is the year 1830 and shows phase B Differential ...
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Keywords: Climatic Cycles and Tree-Growth Plate 9.jpg en Plate 9 A Periodogram of the sunspot numbers 1755-1911 Corrugations show periods The numbers give length of period in years The white line is the year 1830 and shows phase B Differential pattern used in making the periodogram consisting of the sunspot curve mounted in multiple C Same pattern photographed out of focus to show discontinuities in the vertical lines D Sweep of sunspot numbers 1755-1911 E Differential pattern of sunspot numbers made by the periodograph process 1919 Climatic Cycles and Tree-Growth Andrew Ellicott Douglass PD-old-100 Climatic Cycles and Tree-growth Solar cycles
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