United States. Department of the Treasury. "Coast and Geodetic Survey," in United States. Department of the Treasury. "Annual Report of the Secretary of the Treasury on the State of the Finances for the Year 1894," Annual Report of the Secretary of the Treasury on the State of the Finances (1894) : 62-64. https://fraser.stlouisfed.org/title/194/item/5540/toc/269071 , accessed on July 16, 2024.