. Carnegie Institution of Washington publication. CYCLES. 109 The agreement seems to the writer to justify the conclusion that the tree record may indicate a possible sunspot period of years from 1400 to 1550 and of from the latter date to 1600. Sequoia pattern.—Pattern B in plate 10, opposite page 94, is naturally the most interesting in respect to age, as it gives the sequoia analysis for 3,200 years. The solar cycle subject to slight variations may be dimly seen in large parts of it. It shows with some prominence during the first 500 years of our era, then for a few hundred years
. Carnegie Institution of Washington publication. CYCLES. 109 The agreement seems to the writer to justify the conclusion that the tree record may indicate a possible sunspot period of years from 1400 to 1550 and of from the latter date to 1600. Sequoia pattern.—Pattern B in plate 10, opposite page 94, is naturally the most interesting in respect to age, as it gives the sequoia analysis for 3,200 years. The solar cycle subject to slight variations may be dimly seen in large parts of it. It shows with some prominence during the first 500 years of our era, then for a few hundred years near the year 1000 A. D., and for a long interval in the first 500 years of the record. There is opportunity for extensive study of these short periods, interpreting them by the aid of more widely scattered groups and other kinds of trees, and when possible by weather 5O 6O I2O 130 lOO 90. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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