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THEISS (Hungarian, Tisza; Lat., Tisia...

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Originally appearing in Volume V26, Page 758 of the 1911 Encyclopedia Britannica.
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THEISS (Hungarian, Tisza;
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Lat., Tisia or Tissus)
  , a large affluent of the Danube, next to which it is the greatest
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river of Hungary . It rises in the north-eastern
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part of the Carpathian mountains, in the county of Maramaros, at a height of above 6300 ft., and is formed by the confluence of two branches, the Black Theiss (Fekete Tisza), and the White Theiss (Feller Tisza), which unite at about 20 M . E. of Maramaros-Sziget . The Theiss then follows a north-
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westerly direction until it leaves its mountainous valley, then runs west, and after a
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great curve to the north, takes a south-westerly direction and enters the great Hungarian plain (Alf Old) . From Szolnok it runs south in an almost parallel course with that of the Danube, from which it is separated by a distance of about 6o m., and flows into the Danube near the
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village of Titel, 20 m . E. of Ujvidek . Its length from source to mouth is, as the crow flies, only about 340 m., but its windings make its course about 870 M. long . The Theiss is clear and swift in its course through the mountains, but in the plain it becomes slow, somewhat muddy and very tortuous . Its basin covers an
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area of 56,600 sq. m., and comprises the whole eastern part of Hungary, and the greater part of Transylvania, and collects all the rivers descending from the Carpathians westward . The Theiss is navigable for rafts almost everywhere, but for steamers only from Szolnok downwards, a distance of about 200 m., where the breadth of the river is 45o to 750 ft . The
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depth of the Theiss at low-
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water mark is 7 ft. at Tokaj, 20 ft. at Szeged and 11 it. at Titer, near its mouth, while the difference between the low-water mark and the high-water mark is as high as 25 to 35 ft . During its course through the great Hungarian plain the Theiss flows between flat, low-lying banks. which are the cause of periodical and sometimes disastrous inundations and of extensive marshes .

Therefore extensive

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works have been undertaken for the regulation and canalization of the river, which is now strongly dammed in many parts . By these works large tracts of marshes have been transformed into productive ground . Its chief tributaries are the Szamos, Ki ros, Maros, Latorcza, and the Saj6 . In its
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lower course ' it is joined to the Danube by the Franz Josef canal, while it is also
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united with
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Temesvar by the Bega canal .

End of Article: THEISS (Hungarian, Tisza; Lat., Tisia or Tissus)
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