In 1903, he sent 500 prints of his snowflakes to the Smithsonian, hoping they might be of interest to Secretary Samuel P. Langley. These images are now part of the Smithsonian Institution Archives.
Bentley’s book Snow Crystals, with more than 2,400 snowflake images, was published in 1931. This photomicrograph and more than 5,000 others supported the belief that no two snowflakes are alike, leading scientists to study his work and publish it in numerous scientific articles and magazines.
See Bentley's photographs, which are not on display at any museum, online at The Smithsonian Institution. Link