Pantograph used in map making. Location unknown. n.d.
Summary
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.”
Summary
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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Material Request Instructions
Available in the U.S. Geological Survey, Denver Library Photographic Collection, Subject Album area, Topography Instruments Collection.
Rights
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