Chart exhibiting normal course velocity (2 Ergebnisse)

unbound. Sea chart. Uncolored engraving. Image measures 7.5 x 9 inches. This fantastically detailed sea chart issued by the United States Coast Survey in 1851 beautifully depicts the Boston Harbor and tidal currents. It extends as far north as Nahant, as far south as Petticks Island, to Hull, and as far west as Boston.The map is in good condition, with minor toning. Alexander Dallas Bache (1806-1867) was an incredibly prolific surveyor, who worked as the superintendent of the United States Coast Survey from 1843 to 1865. Over the course of the 19th century, the survey worked closely with the U.S. Navy to produce sea charts of the country's waters that could serve scientific as well as military functions. This crisp and bright sea chart of the waters around Boston Harbor is a beautiful document of this historical effort, and one of few maps that he personally partook in surveying.…

This 1848 map of Boston Harbor shows the direction of the currents and the scales of their velocities (mph) around Long Island, Nantasket Island, Deer Island, and in Boston. It extends as far north as Nahant, as far south as Petticks Island, as far east as Hull, and as far west as Boston. This map measures 8 inches by 9 inches.…