Mark Twain in his Oxford University robes, by Alvin Langdon Coburn, ca. 1909 --- These are rare photos of Mark Twain in color (early Autochrome). Autochrome is an additive color “mosaic screen plate” process. The medium consists of a glass plate coated on one side with a random mosaic of microscopic grains of potato starch dyed red-orange, green, and blue-violet (an unusual but functional variant of the standard red, green, and blue addit|Laura Dal Moro приколол(а) это к доске People

Mark Twain in his Oxford University robes, by Alvin Langdon Coburn, ca. 1909 --- These are rare photos of Mark Twain in color (early Autochrome). Autochrome is an additive color “mosaic screen plate” process. The medium consists of a glass plate coated on one side with a random mosaic of microscopic grains of potato starch dyed red-orange, green, and blue-violet (an unusual but functional variant of the standard red, green, and blue addit|Laura Dal Moro приколол(а) это к доске People