Geographical and Geological Surveys

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Stran 34 - For extending the triangulation of the coast survey so as to form a geodetic connection between the Atlantic and Pacific coasts of the United States...
Stran 42 - ... 2,000 was made to carry on the work, and the towns and cities of the Commonwealth were required, under a penalty for non-compliance of $ 100, to have minute and accurate surveys of their respective territories made within a year, and the State surveyor was to " project an accurate skeleton plan of the State," which should " exhibit the external lines thereof, and the most prominent objects within those lines, and their locations." The triangulation was mainly executed by Mr. Simeon Borden and...
Stran 39 - ... busy ourselves with the geographical material furnished by these surveys. In the first place, the entire unavailability of the system for mountainous regions is to be noticed. The lines cannot be run with a compass and measured with a chain with even a rude approach to accuracy, except in a region which is, at least, moderately level. This is shown by the fact that the townships and sections, in the few cases where the work has been carried into the mountains, have proved, on examination, to...
Stran 93 - All the attempts at working them have, however, proved to be unprofitable ventures ; although a great deal of money has been spent in this way at various times since 1765. The same has been the case with the other metalliferous veins of New England ; almost without exception the mines which have been opened on them have been disastrous failures. Eaton, Shelburne, and Warren, in New Hampshire, may be cited as typical localities, where flattering surface indications have led to extensive mining operations,...
Stran 50 - ... same ground, by two, if not three, different parties, and in two different departments. At the investigation referred to above, the influence of the most eminent scientific men throughout the country was exerted in favor of the continuance of the geographical surveys begun by Mr. Gardner under the direction of the Secretary of the Interior. This was done because, as was clearly shown before the committee, the four maps issued by the Engineer Bureau, as a first instalment of the " Geographical...
Stran 49 - Survey," having been in charge of a United States engineer officer of that name. It was begun in 1869, and last year the first number of an atlas was issued which gives an idea of the general plan and execution of the work. According to an outline sketch in the atlas, the whole region west of the one hundredth meridian is to be represented on ninety-four sheets, each eighteen by fifteen inches in size, and on a scale of eight miles to an inch (1 : 506,880) ; of these four are given in the first number,...
Stran 29 - Act, by which the work was authorized, was one requiring the preparation of " suitable maps," and this was construed by the State Geologist to mean maps as accurate as could be made with the means at his command. In the ten years during which this work was carried on, considerable progress was made in developing the detailed structure of both the Coast Ranges and the Sierra Nevada, and several maps were published, on scales of two and six miles ; and also a general one of both California and Nevada,...
Stran 50 - No. 240. ical and geological work in the Far West, under one supervision, in one department, there is just that method employed which leads to bad results and great waste of money. Congress is at this moment paying to have the same work done, on the same ground, by two, if not three, different parties, and in two different departments. At the investigation referred to above, the influence of the most eminent scientific men throughout the country was exerted in favor of the continuance of the geographical...
Stran 16 - The publication of the plane-table sheets was commenced in 1868, and in 1873 120 had been issued. There has also been, since 1841, a general map in process of publication, on a scale of 1 : 100,000, which will be comprised in some 400 sheets, of which nearly all are issued. These are engraved on copper and have the topography, or hillshading, indicated according to Lehmann's system, as modified by General Muffling. In Baden, the new map was commenced in 1874, on a scale of 1 : 25,000, and with contour.lines...
Stran 17 - ... territory, just about twice the size of that of the United States, Alaska included, has been for many years actively engaged in prosecuting geographical surveys. The map of Russia in Europe, embracing about 2,100,000 square miles, has been under way since 1857, and will be embraced in about 700 sheets, of which 454 had been published in 1872. This is on a scale of 1 : 126,000. The military map of Poland is on the same scale, and is embraced in 57 sheets, all of which are published. Special maps...

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