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Album caption: Pivots for 622-type curent meters. Also No. 681 of Water Resources Instruments Album. No index card.
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Album caption: Range Finder. R.L. Atkinson, Birdseye (See I-Topo-21), Carl H. Au.
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Album caption: Flat wading rod. Also No. 680 of Water Resources Instruments. No index card.
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Album caption: An alidade. Feb 2, 1925. No index card.
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Album caption: Slotted Template Layout. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.
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Album caption: Blue line processes on metal mounted boards for field and color separation drafting. No index card. Album note: Photographed and compiled by E.F. Patterson.
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Album caption: A stereoscope. No index card.
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Album caption: Type A current meters. Pygmy current meter, miniature current meter. Also No. 682 of Water Resources Instruments Album. No index card.
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Album caption: Complete Multiplex Mapping Unit showing portion of compiled map. No index card. Album note: Photographed and compiled by E.F. Patterson.
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Album caption: Illustration of a drafting trainee, consistent line wieght and smoothness of line is emphasized. An employee is trained approximately two months before going on production. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952. Published as figure 23 in the USGS Circular 1341, History of the Topographic Branch (Division). Caption from published photo, Figure 23. Pen-and-ink drafting for map production was used from the early 1940s through the mid-1950s. Inking contours by hadn required a light touch to maintain consistent line weight (1952). Email communication USGS employee on May 26, 2021, "... it looks like a scope they used to determine line widths and spacing....
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Album caption: H&H multiplex supporting frame with equipment. No index card. Album note: Photographed and compiled by E.F. Patterson.
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Album caption: Rear tapeman holding break of tape on tally pin. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.
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Album caption: Wild Autograph Model A-6. No index card. Album note: Photographed and compiled by E.F. Patterson.
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Album caption: Solar equipment. See also Instruments-Topo no. 10. No index card.
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Album caption: Telescopic alidade. No index card.
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Album caption: Triangulating while using canvas wind and sun shelter, (leeward side). No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.
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Album caption: Pocket truck used for carrying motor analizer and equipment for making repairs in the field. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.
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Album caption: Taping over flat terrain, using spring balance. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.
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Album caption: None supplied. No index card. Personal communication from Clay Martin, Field Records Collection, on June 28, 2018, “It appears to be a type of pantograph, used for transferring a drawing to another surface by tracing over the drawing with a stylus while a pen mounted elsewhere on the instrument redraws the image, usually at a different scale.”
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Album caption: Reading deflection angles on third order T.T. with Wild T-1 Theodolite. No index card. Note on album: Photographed and compiled by E.F. Patterson, August 1952.