. Carnegie Institution of Washington publication. 34 36 39 42 45 '>-•" 40 43 38 1 / m\ ^'~ 41 44. 54 58. 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, bookdecade1910, bookyear1916