Hydrographical Observations from tlie Danmark Expedition. 413 



had landed is a place where children often go to play, I have every 

 belief it had been landed with the "Flood Tide", the day on which 

 I picked it up. (Sign.) C. Henderson. D. J. R.". 



No. 177. "Eriskay. So. Uist. Hebrides. Jan. 9th 1912. Dear 

 Sir. In reply to your letter I have to say that the bottle found by 

 me here, and forwarded to you, must have reached Eriskay that same 

 day ! It landed just under my house, and could not have been there 

 л^егу long лл -ithout being observed; I would say that it could not have 

 landed before the day on which it was discovered by me. — It landed 

 on a sandy beach, about high tide and I am confident that that was 

 the first place it touched (here at least) since being cast into the sea. 

 With apologies for delay in replying. (Sign.) Roderick Mc. Innis". 



These letters show, that it must be taken as extremely probable, 

 that the bottles were found almost on the same day that they drifted 

 on land and, consequently, that they must have been drifting about 

 2% to 3 years. 



Bottles 208, 212 were thrown out on the return voyage, only 

 some days later than 177 and 188, but in the eastern part of the Polar 

 Current and both were found on the Norwegian coast at respectively 

 Kristianssund and Hammerfest. These bottles have certainly drifted 

 along the ordinary route, southwards with the Polar Current and 

 thereafter eastwards round Iceland with the East-Icelandic Current. 



The bottles 218, 221, 226, 230, 236 and 237 were thrown over- 

 board in ice-free water in the Norwegian Sea on the voyage from N. E. 

 Greenland to Bergen. No. 218 was recovered on Iceland after a drift 

 of 293 days, the others after a longer drift along the Norwegian coast 

 from Trondhjem to Hammerfest. 



This drift of the bottles seems to show, that the current in this 

 part of the Norwegian Sea forms a similar circuit as near to the Green- 

 land coast, that is, first to the south, thereafter east past Iceland, 

 north round the Færoes and further along the Norwegian coast. 



B. Current measurements in the waters in the neighbourhood of 

 Danmarks Havn. (Table 11 p. 414). 



Remarks: Simultaneously with the salinity and temperature 

 observations a number of current measurements were made in the 

 fjords and sounds in the neighbourhood of Danmarks Havn and all 

 shoAved, that the currents west of the line between the outermost 

 skerries were exclusively caused by the tides. 



The measurements were carried out by means of an ordinary 

 bag of canvas, which was made to sink quite slowly by weights, so 

 that it reached down below the edge of the ice. (The net sank ca. 

 1 — 2 m. per minute). Inside the bag a thin line of hemp was attached 

 and for 1 minute after the bag had passed the lower edge of the ice the 



