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Back of real-photo postcard, with one handwritten line of text: Miss Sarah Thompson. Divided back and style indicates 1910s.
Care de viste of four Norwegian women. Taken in Arendal, Norway, by the photographer H.P. Nielsen. The original photo has some scratches and was of very low contrast, which accounts for the high grain in the photo above; their faces are nearly indistinguishable to the naked eye in the original. Appears 1880s.
An advertisement from The Farmer, 2 July 1960, for WCCO Broadcaster Cedric Adams.
From the encyclopedic series The Book Of Knowledge comes this bit of practical information: “How To Build A Magic Lantern“. These are what we’d call today a “slide projector”. At the time, however, slides were images on largish pieces of glass, and the light source was an open flame. The instructions rely on store-bought lenses, but the body is completely manufactured by hand from materials such as brass, japanned tin, and wood. If the steampunks among you are interested in building a paraffin-powered LCD projector, this is a starting point.