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Album caption: Complete multiplex mapping unit showing portion of compiled map. Photograph taken by E.F. Patterson, August 1952. Negatives on file in Central Region. No index card.
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Album caption: Long multiplex bar with Zeiss wide angle projectors. For use in stereo-triangulation. Photograph taken by E.F. Patterson, August 1952. Negatives on file in Central Region. No index card.
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Album caption: H&H multiplex supporting frame with equipment. Photograph taken by E.F. Patterson, August 1952. Negatives on file in Central Region. No index card.
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Album caption: The multiplex stereoplotting instrument is especially advantageous in that interpretation, measuring, and plotting of geologic data can be carried out in one continuous operation. ca. 1956. No index card. Published as figure II in U.S. Geological Survey. Bulletin 1043-A. 1956.
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Album caption: The Kelsh plotter, which uses a projected model scale about 5x that of the original photography, giving the interpreter a great advantage in interpreting geologic data as well as positioning such data on the base map. As with the multiplex, interpreting, measuring, and plotting geologic data can be done in one continuous operation. ca. 1956. No index card. Published as figure 12 in U.S. Geological Survey. Bulletin 1043-A. 1956.
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Album caption: The Hugershoff Aerocartograph. n.d. No index card.
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Album caption and index card: Twinplex stereoscopic plotter for transverse and convergent photography. Photogrammetry, Topographic Division, U.S. Geological Survey. Denver, Colorado. December 1955.
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Album caption: Long bar with multiplex projectors. Photogrammetry, Topographic Division, U.S. Geological Survey. Denver, Colorado. 1955. No index card.
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Album caption: Principle of plane-tabling. n.d. No index card.
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Album caption: Single pair of multiplex projectors for stereoscopic plotting. Photogrammetry, Topographic Division, U.S. Geological Survey. Denver, Colorado. December 1955. No index card.
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Album caption: Twinplex and Russell K. Bean, room 106. Portrait. No index card.


    map background search result map search result map Long bar with multiplex projectors, Denver, Colorado. 1955. Single pair of multiplex projectors, Denver, Colorado. 1955. Twinplex stereoscopic plotter, Denver, Colorado. 1955. Long bar with multiplex projectors, Denver, Colorado. 1955. Single pair of multiplex projectors, Denver, Colorado. 1955. Twinplex stereoscopic plotter, Denver, Colorado. 1955.