Seventh annual report on the progress of the topographical survey of the Adirondack
region of New York to the year 1879 : containing the condensed reports for the years
1874-75-76-77 and '78 : with late results in geodetic and trigonometrical measurements,
magnetic variation, hydrography, river surveys, leveling and barametric-hypsometry,
meteorology, rain-fall, botany, zoölogy and geology / by Verplanck Colvin, 1880