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Scientific American, Vol. 38, No. 10 (1878) (1878)

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An illustration from Scientific American, Vol. 38, No. 10 (1878), 1878, leaf 0
tured only by the inventor in France. At- this apparatus with some curiosity. It resembles a hat, and placed and clamped by the ring, D. It will be observed from tempts, we are informed, have been made to produce the in- in a mysterious manner it adapts itself to any one’s head the the sectional… … Sot CONFORMATOR.

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