The "old thirteen" and Maine, Vermont, Kentucky, Tennessee, and West Virginia were surveyed in a very irregular way. Lands were described as bounded by lines running from stumps to stones, thence to a creek and down the main channel thereof. In 1785, a committee of the continental congress was appointed, with Thomas Jefferson as chairman, to devise a simple and uniform mode of surveying the public lands in what was about to be organized as the Northwest Territory.
The most noticeable peculiarity of the system is that it is rectangular. A prime meridian is first determined, then a baseline crossing it at right angles. Then from points on the baseline six miles and multiples thereof from the meridian, lines are run due north. And parallels to the base-line are run at distances of six miles. The approximate squares thus formed are called townships. The rows of townships running north and south are called ranges. Townships are numbered north and south from the base-line; ranges east and west from the meridian. The diagram on page 341 illustrates the system.
Since meridians all terminate at the poles, the lines between ranges, being meridians, gradually approach each other as they go northward. The lines, then, soon become so much less than six miles apart that a new beginning has to be made. The parallel upon which this correction is made is naturally called the correction line. Corrections were at first made every thirty-six miles, but they are now made every twenty-four miles.
The first prime meridian starts at the mouth of the Great Miami and forms the western boundary of Ohio. The second prime meridian begins at the mouth of Little Blue Creek, in Indiana. The third, at the mouth of the Ohio; the fourth at the mouth of the Illinois; and the fifth at the mouth of the Arkansas. [Illustration: RANGES AND TOWNSHIPS] [Illustration: The numbering of sections in a township.] [Illustration: Divisions of a section.] The first prime meridian has several base-lines. The base-line of the second meridian crosses it about twenty-four miles north of its point of beginning, and the base-line of the third is a continuation of that of the second. The principal base-line of the fourth meridian coincides with the southern boundary of Wisconsin. It has also a short base-line about six miles north of Quincy, Ills. The base-line of the fifth meridian is just south of Little Rock, Ark.
From the first meridian most of Ohio is surveyed; from the second, Indiana and the eastern twenty-four miles of Illinois; from the third, the rest of Illinois, except a small portion north of Quincy; from the fourth, the portion of Illinois just referred to, all of Wisconsin, and that part of Minnesota east of the Mississippi; from the fifth, Arkansas, Missouri, Iowa, Minnesota west of the Mississippi, and the Dakotas east of the Missouri.
The sixth coincides with meridian 97° 22', west of Greenwich. From it are surveyed Kansas, Nebraska, Dakota south and west of the Missouri, Wyoming, and all of Colorado except the valley of the Rio Grande del Norte.
Michigan, Florida, Alabama, Mississippi, and the states and territories in the far west are surveyed from special meridians.
HOW TO SECURE PUBLIC LANDS.
As a general rule, only surveyed lands are subject to entry. Under the mineral land laws, however, claims can be located upon unsurveyed lands.
The public lands are divided as to price into two classes: those whose minimum price is $1.25 per acre and those whose minimum is $2.50 per acre. The latter, usually called "double minimum lands," are in most cases the alternate sections reserved in railroad or other public land grants. In some cases Indian reservations restored to the public domain have been rated differently, the price varying from below the single minimum to above the double minimum.