Baylor University chemist Bryan F. Shaw shows a tactile lithophane codex of a butterfly, which high-school students from the Texas School for the Blind and Visually Impaired used as the base image, ...
Cast iron oil lamp with lithophane porcelain inserts (1860–79) (Museum Catharijneconvent, via Wikimedia) Imperceptible in the light, only when illuminated by flame in the dark is a 19th-century ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results