The Photographs of the Yolo Base Line, California, were taken during 1881 in Yolo County by Werner Suess and show men of the
U.S. Coast and Geodetic Survey, including George Davidson, the moveable tent (Yolo buggy) used in the survey, men taking measurements,
and the camp near "Middle Base." "The Yolo Base Line" refers to Davidson's geodesic measurement of the base lines upon which
all distances in the extensive triangulation of the State of California depend. The first was the Yolo Base line measured
twice by him in 1881, of which this collection is a record, the second was the Los Angeles base line measured three times
in 1888-89. Davidson was also president of the California Academy of Sciences, a Professor of Geodesy and Astronomy, and later
a Regent of the University of California.
Copyright has not been assigned to The Bancroft Library. All requests for permission to publish photographs must be submitted
in writing to the Curator of Pictorial Collections. Permission for publication is given on behalf of The Bancroft Library
as the owner of the physical items and is not intended to include or imply permission of the copyright holder, which must
also be obtained by the reader.