The border between the states of Pennsylvania, Maryland, and West Virginia in the United States. During the colonial period, there was a continuous border dispute between the Penn family, the lord of Pennsylvania, and the Baltimore family, the lord of Maryland. The border was established in 1763-68 by British surveyors C. Mason and J. Dixon (total length: 375 km), and in 1784 it was extended to western Virginia (present-day West Virginia). It was later used in the Missouri Compromise as the border between slave states and free states, and is still generally considered to be the line that separates the North and South. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
アメリカ,ペンシルバニア州とメリーランド州,ウェストバージニア州との境界線。植民地時代,ペンシルバニアの領主ペン家とメリーランドの領主ボルティモア家との間に境界争いが続き,1763~68年イギリス測量士 C.メーソンと J.ディクソンが測量してこの境界線が成立 (全長約 375km) ,84年バージニア西部 (現ウェストバージニア州) まで延長された。その後奴隷州と自由州との境界線としてミズーリ妥協案のなかで使用され,現在でも一般に北部と南部を分ける線と考えられている。
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