Plate IX, Figure 4 -- alidade for use with plane table mapping. In: Papers on various subjects connected with the survey of the coast of the United States" by Ferdinand Hassler. Communicated March 3, 1820. Published in United States" by Ferdinand Hassler. Communicated March 3, 1820. Published in 232-420. Library Call Number QB281.2 .H28 1825.

Image ID: libr0064, Treasures of the NOAA Library Collection
Photographer: Archival Photograph by Mr. Sean Linehan, NOS, NGS


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