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the fishermen, he has, as accurately as it coiild be done, counted them all 

 and mapped them out. 



Moreover, the Inspedor of the Fislieries tvifhin the Shaw has given me 

 information of the traps on part of the eastern shores of Jutland north of 

 Djursland; the Snrveyor of the Fisheries of Jutland has given me information 

 of those in the Limfjord, and Mr. Iversen, the Keeper of the Fisheries in 

 Binglijøhing Fjord, of the traps here. 



This counting and the drawing of these charts, which could be done only 

 in the autumn, in the proper migration-time, has by no means been an easy 

 task. It has often been prevented by bad weather, and it has not ahvays been 

 easy to go so near the traps in the "Sallingsund" that tliey could be counted 

 with certainty, without running the risk of grounding the vessel. But after 

 two years' work (1899 & 1900) the counting has now been completed: not so 

 that we can state with absolute certainty the number of traps — this varies 

 not a little from year to year at several piaces — but at any rate so that we 

 get a good idea of where our silver-eel fisheries are canied on. 



One source of errors I shall mention, however, which has the effect that 

 the number of traps is not, and cannot be, exact in the list: the circumstance 

 that, in the "Aalegaarde'', particularly in the large ones in Jutland, several 

 traps are often set side by side in the "Gaarde". These parallel traps, gene- 

 rally two I think, but sometimes 3 or 4, have almost always been counted 

 as one trap, because their number cannot be seen from the sea. The whole 

 undertaking would have been delayed by landing at these piaces, and I do 

 not think, after all, that the general view suffers from this defect. Moreover, the 

 situation of the traps is not effected by it; only their number becomes, at certain 

 piaces, particularly in Jutland north of Aarhus, somewhat too small in the list. 



The object of the whole counting of traps has been, partly 1) to get 

 exact knowledge of where, in which direotion, and in how large numbers, 

 the silver eel migrates along our shores; partly 2) to examine whether the 

 eel-trap fishery is really carried on at all the piaces, and on a sufficiently 

 large scale, where we may suppose that it can be carried on. 



The affixed General Chart has been constructed in the folio wing way: 

 The 10-fathoin curve marks the boundary-line between the lower water and 



that which is deeper than 10 fathoms. 

 The green spots are the piaces where the vegetation is particularly rich, i. e. 



where zostera grows in greater quantities. Thej' are, on the whole, iden- 



tical with the dwelling-places of the yellow eel, and with the piaces 



where the eel-seine fishery is carried on. 



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