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 ...
Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Before photography, there was the lithophane. It’s a thin slice ...
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