BENTLEY, W. A., and W. J. Humphreys.
First edition, first printing, of this beautiful monograph by the American pioneer of snowflake photography. William A. Bentley (1865–1931) photographed more than 5,000 snowflakes during his lifetime, making the discovery that each one was unique. Bentley wrote extensively for scientific journals but this is his only book. Co-written with William J. Humphreys, a physicist with the US Weather Bureau, it was published shortly before Bentley died of pneumonia, which he had caught walking home through a blizzard. Scarce in such nice condition.
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Quarto. Original blue cloth, titles to spine and snowflake design to front board gilt, double rule to front board in blind. Black and white portrait frontispiece, over 2,300 photographs of individual snowflakes, usually shown in a grid of 12 specimens, illustrations in the text. Boards a little rubbed and scuffed, the occasional finger mark to margins but overall contents clean and bright. An excellent copy.