US Presidency
1842

John; the intersection of the Southwest Branch by the parallel of latitude 46 degrees 25 '; the source of the Southwest Branch; the source of Halls Stream; the intersection of Halls Stream by the west line; Rouses Point; St. Regis; Derby. But similar maps have not been prepared by the American commission, because during the interval between the finishing of the maps of the British commission and those of the American it was thought that the maps already constructed upon a scale of 4 inches to 1 mile represented the boundary with sufficient clearness and accuracy. The astronomical observations were begun at the Grand Falls early in June, 1843, and were carried up the St. John River to the Northwest Branch by a chain of stations, which, together with the results obtained, are tabulated in the appendix accompanying this report. From the valley of the St. John an astronomical connection was made with Quebec, and thence to Montreal, and so to Rouses Point. From Rouses Point a connection was obtained with Cambridge University, near Boston.