MARTHA'S Vineyard, an island of North America, near the coast of New England, 80 miles south of Boston. It is sixteen miles in length and eight in breadth, and has a light soil, which in some places is fertile. In conjunction with neighbouring islands of smaller size, it forms Duke's county, containing about 3290 inhabitants. The climate is temperate and healthy; the winter is generally mild, and in summer the temperature seldom exceeds 80 of Fahrenheit. The inhabitants apply themselves chiefly to the fisheries, in which they have great success. W. Lon. 70. 35. N. Lat. 41. 0.