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Scientific American, Vol. 38, No. 6 (February 1878) (1878)

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An illustration from Scientific American, Vol. 38, No. 6 (February 1878), 1878, leaf 0
the west.the deflection takes place in R and R'. A counterpoise at P balances the weight of into position to reflect the zero or center of the scale into that direction. ZSllner found the instrument so sensitive to W and its attachment. The weight carries a mirror, M, the telescope. Professor Rood… … ZOLLNER'S HORIZONTAL PENDULUM. © 1878 SCIENTIFIC AMERICAN, INC

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