Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41939

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41940

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41941

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41942

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41943

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41944

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41945

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41946

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41947

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41948

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41949

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41950

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41951

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41952

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41953

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41954

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41955

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41956

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41957

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41958

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41959

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41960

Wilson A. Bentley, 1893-1931 (ca), Snowflake, Photomicrograph, 2 7/8 x 3 1/2 ins, Carl Hammer Gallery, LL/41961

Wilson A. Bentley, 1895 (ca), Snowcrystal, Albumen print, 3 x 4 in (7.5 x 10 cm), Swann Galleries - New York, Courtesy of Swann Galleries (Auction, Dec 7, 2006, #2097, Lot 372), LL/15996

Wilson A. Bentley, 1900 (ca), Snowflake crystals, Gelatin silver print, Mineralogical and Geological Museum, Courtesy of the Mineralogical and Geological Museum, Cambridge, MA, USA, LL/6946

Wilson A. Bentley, 1903-1910 (ca), Snowcrystals, Gold-chloride toned photomicrographs from glass plate negative, 3 x 4 in (7.6 x 10.2 cm), Swann Galleries - New York, Courtesy of Swann Galleries (Auction, Oct 22, 2009, Photographs & Photographic Literature, Sale 2191 Lot 64), LL/33432