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Part III. — Eighteenth Annual Report 



the coast of Yorkshire in from 14 to 16 days; one at 70 miles was 

 picked up on the coast of Northumberland after 99 days ; one, at 100 

 miles, was found at Mano, Jutland, on 11th August 1897, after 297 days ; 

 two at 130 miles were recovered, one on the coast of Northumberland, 

 after 98 days — probably brought back by the reversed current — and one 

 on 30th July 1897, after 285 days, on the Danish coast. One from each 

 of the lots set adrift at 150, 200, 250, and 300 miles (the latter point 

 about 74 miles west of Heligoland) were subsequently found. The one 

 from 200 miles was caught in a trawl net 100 miles E. by N. of Spurn 

 Point, Yorkshire. That from 150 miles was got on the Danish coast of 

 the Skagerack on 28th September 1897; the one from 250 miles was 

 found at Bingkjbbing, on the west coast of Denmark, in July ; and that 

 from 300 miles, at Jsedern, Norway, on 26th February, after 131 days. 



In the December series 120 bottles were used, of which 50, or nearly 

 48 per cent., were recovered. Seven of the twenty set adrift at 60 

 miles from May Isle were found on the island of Sylt, Schleswig, on the 

 coast of Denmark, and the west coast of Sweden, from 31st July to 30th 

 August 1897, the periods varying from 221 to 251 days; the one that 

 went furthest — to the Bohusl'an coast, Sweden, was picked up after 240 

 days. Two others of this lot were got later, in November and December, 

 after 329 and 359 days, at the mouth of the Christianiafjord. Thirteen 

 of the twenty set adrift at 100 miles were recovered, three off the 

 Schleswig coast on 31st July and 12th and 13th August 1897, and the 

 remainder in August and the first two days of September, on the west 

 coast of Denmark. Six from 200 miles were found ; one on 10th April 

 1897, at Sumburgh, Shetland, one on 28th October on the Danish shore 

 of the Skagerack, one on the 30th of the same month, near Stromstad, 

 Sweden, and the others on the coast of Norway, one near Bergen on 19th 

 September, one on 28th October, after 309 days, further north, near 

 Askevold, N. Berghus, the third on 20th March 1898, near Aalesund, 

 Pomsdal. Of those set adrift at 250 miles, seven were recovered ; one, 

 on 10th August 1897, at Harboore on the Danish coast ; two on the west 

 coast of Sweden on 18th September and 28th December; and the others 

 in Norway in September, October, and December, between Kragero and 

 Udsire, off the Bukkefjord. Five of those set adrift at 300 miles were 

 found in August and September 1897, four on the south and south-west 

 coast of Norway, and one on the west coast of Sweden. Of twenty set 

 adrift at 350 miles — about 24 miles west of Heligoland — ten were 

 recovered; the first 16 days later at the Horn, Denmark; two others in 

 July and August, also on the Danish coast ; one on the west coast of 

 Sweden in August, and six on the south-west coast of Norway in May, 

 June, July, November, and December 1897. 



The results, then, of this further information as to the surface-drift of 

 the water of the North Sea are in agreement with the conclusions stated 

 in my previous paper. The Atlantic water coming into the North Sea 

 passes down the east coasts of Scotland and England to about the 

 neighbourhood of the Wash ; it then crosses towards the coast of 

 Schleswig and Denmark and passes northwards to the south coast of 

 Norway, and thence northwards along the west coast of Norway. 

 Sometimes it passes into the Skagerack to the coast of Sweden and the 

 Christianiafjord. 



The value of the above drift-bottle observations is discussed in a recent 

 work by Professor Otto Pettersson of Stockholm, dealing with the hydro- 

 graphy of the North Atlantic* 



* Die hydrographischen Untersuchungen des Nordatlantischen Ozeans in den Jahren, 

 1895-1896. Petermann's Geogr. Mitteil, 1900, Heft. 1., II. 



