Rensselaer Union, Volume 9, Number 41, Rensselaer, Jasper County, 28 June 1877 — An Ingenious Map. [ARTICLE]

An Ingenious Map.

About the Ist of January, 1876, Prof. Hitchcock, of the Geological Survey, and his assistants began the construction of a raised map of New Hampshire, the design of which was to combine all the present knowledge of tbe geography of the Slate which had been obtained in the geological survey made by Prof. Hitchcock, Prof. Huntington and others. This map has just been completed, and on Tuesday was placed in the State House. Thtf map is fourteen feet ten inches long, representing 178 miles in length (being constructed on a scale of one mile to the inch) and ninety-three miles in width, from the mouth of the Piscalaqua River to the northwest comer of Hinsdale, showing the entire surface of tbe State, 0,336 square miles. It also shows all tbe rivers and brooks, ponds and lakes, hills and mountains, and the town and county lines, railroads, etc. The names of all cities and tow*ns, rivers and principal brooks, lakes and ponds, mountains and high elevations, are given conspicuously, so that any one can find at a glance what they desire to look up. The height of tlie hills and mountains is given on a scale of one inch to 1,000 feet, and actual measurements are given when known. The map is constructed of pine and basswood, and the ‘ process of the work was this: A map was first drawn on paper of the same size as the raised map* with all the outlines of towns, streams, ponds, etc., and contour lines for each 500 feet were drawn. Tracings of the contour lines were made on inch layers of pine and bass boards, maintaining as accurately as possible the relative size and shape. These are fastened upon each other, and the valleys are beveled out with chisels. — Concord (N. II.) Monitor.