. Carnegie Institution of Washington publication. i!io £ « ft 03 Oh I§l inches. M iJO "" rH .2 -^ *^ rt 2 § ftS -g M CO inches. 10

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. Carnegie Institution of Washington publication. i!io £ « ft 03 Oh I§l inches. M iJO "" rH .2 -^ *^ rt 2 § ftS -g M CO inches. i'oi5 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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Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1920, bookyear1921