Description of a reflecting lantern and a heliotrope, used by major J. D. Graham, as meridian marks for great distances, in 1841, while tracing, in his capacity of U.S. commissioner, the due north line from the monument at the source of the river St. Croix

doi:10.1016/s0016-0032(43)91468-1

Description of a reflecting lantern and a heliotrope, used by major J. D. Graham, as meridian marks for great distances, in 1841, while tracing, in his capacity of U.S. commissioner, the due north line from the monument at the source of the river St. Croix

https://doi.org/10.1016/s0016-0032(43)91468-1

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Journal: Journal of the Franklin Institute

Publication Date: Jun 1, 1843

#Meridian Marks #Great Distances

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Abstract

Description of a reflecting lantern and a heliotrope, used by major J. D. Graham, as meridian marks for great distances, in 1841, while tracing, in his capacity of U.S. commissioner, the due north line from the monument at the source of the river St. Croix

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