356 



"Part III — Fifteenth Annual Report 



Set Adrift on 

 East Coast of 

 Scotland. 



Found in 



Yorkshire. 



Nov. 1S94, 

 Dec. 1S94, 

 Feb. 1S95, 



t \\ " 

 t „ 1 1 

 % March 1895, 

 t „ 



April 1S95, * 



May 1895, 

 July 1895, 

 August 1895, 



March 1896, 



April 

 May >, 

 June ,, 

 July 

 Oct. 



Feb. 189.1, 5 

 Feb. 1895, 9 



May 1895, 1 

 June 1895, 1 



June 1895, 1 

 July 1S95, 1 



Aug. 189G, 1 

 „ 4 

 Dec. 1896, 1 

 Nov. 1896, 5 

 Jan. 1897, 1 



Lincolnshire. 



Feb. 1895, 2 



Holland. 



Aug. 1S95, 1 



Feb. 1897 § 

 June 1896, 1 

 July „ 2 

 Aug. ,, 1 



Germany. 



July 1895, 3 



July, 1 



Denmark. 



Aug. 1895, 2 * 



Aug. 1895, 9 

 Sept. 1895, 6 

 July 1895, 1 

 Aug. 1895, 2 

 ( Aug. 1895, 2 

 I Sept. 1895, 15 

 Aug. 1895, 5 



j-Sept. 1895, 4 



Sept. 1895, 4 

 Oct. 1895, 1 

 Jan. 1886, 1 



Aug. 1896, 1 



Nov. 1896, 1 



* These were probably at first carried northwards, 

 t 130 and 180 miles east of May Isle. 



i A number of these were got on Northumberland and Durham also. 



§ This drifter was put away in the very north of Scotland, off the coast of Caithness. 



there was an exceptional concentration of the surface water towards the 

 Danish coast in August and September 1895 ; and on referring to the 

 wind chart I find that in June, July, August, and September the effective 

 winds blew from a westerly direction, inclining sometimes towards the 

 north and sometimes towards the south (see Table, p. 358). In the cor- 

 responding period of 1896 the effective winds were less strong, although 

 much in the same direction. 



3. The Cause of the Movement of the Surface Waters. 



The full discussion of the causes that produce the movement of the 

 surface water in the North Sea will be best dealt with by Professor 

 Pettersson when he is dealing with the subject generally. But some 

 points may be here referred to, The factors that appear to bear 

 upon the question are : — (1) The movement of the Atlantic water, 

 or Gulf Stream, across the north-western and northern boundary 

 of the North Sea ; (2) the action of the Baltic current passing out of 

 the Skagerrak during the greater part of the year in a westerly direction 

 along the south coast of Norway, and then in a northerly direction along 

 the west coast ; (3) the minor influence of the rivers that flow into the 

 North Sea, and whose waters pass for the most part in the direction 

 taken by the surface water as above described ; (4) the earth's rotation ; 

 (5) the direction of the tidal streams ; (6) the action of the wind. 



The Prevailing or Effective Winds. 



The wind appears to be the most important influence in determining the 

 movement of the surface water in the North Sea, and I was anxious to 

 ascertain, as precisely as possible, the relation between this movement and 

 the prevailing winds. For this purpose the direction and force of the 

 winds each day from 1st September 1894 to 31st January 1897 at the 

 following stations were tabulated, comprising over 12,000 observations : — 



