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Scientific American, Vol. 58, No. 11 (1888) (1888)
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ering on a moving recorded may be sent to the observatory, where a plate; a vertical seismograph to register vertical mo- record will be kept of all such data, and blue prints will tions on a dial plate ; a duplex pendulum seismograph be made of the diagrams and copies of this sent to the to give… … outer edge, a fine dark line was discernible, which COHESION—RUBBING. BLOCKS TOGETHER. COHESION BLOCKS—THE MOULD. © 1888 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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