326 APPENDIX. No. II. 



Polariscope. — Observations made with a polariscope during the 

 voyage by Surgeon D. Walker, M.D., will be found in the ' Proceed- 

 ings of the Royal Society' for 1859-60, vol. x. p. 558. 



Tides. —The tidal observations made at Port Kennedy have been 

 placed in the hands of the Rev. Professor Samuel Haughton, F.R. S., 

 who is engaged in the discussion of several sets of similar observations 

 made in various parts of the arctic regions where our searching ex- 

 peditions have wintered. In Appendix No. V. of the former editions 

 of the ' Fox Voyage ' will be found Dr. Haughton's notes " on the 

 Tidal Streams of the Arctic Archipelago;" and in the 'Philosophical 

 Transactions of the Royal Society' for 1861-2, his discussion of the 

 tidal observations made at Port Leopold in 1848-9. 



Ice. — Observations on ice, by Surgeon D. Walker, M.D., were 

 published in the ' Royal Dublin Society's Journal ' for i860, vol. ii. 

 P- 376. 



Ice Movements. — On the Effect of Wind in producing Ice Move- 

 ment. — In the 1st and 5th chapters I have noticed, in the former, the 

 Spitzbergen current, in the latter, the probable result of wind, as effect- 

 ing the drift of the ' Fox.' 



The Spitzbergen or Polar current sets round Cape Farewell, follows 

 the trend of the shore to the northwest, bearing heavy ice as far, 

 usually, as 65 N., and still continues northward until deflected off shore 

 to the westward, apparently by banks which lie in 67°N. Here uniting 

 with such current as sets out of Baffin's Bay, it curves southwestward, runs 

 swiftly past Cape Walsingham,and as the "Labrador current" continues 

 its course along that coast towards Newfoundland. 



It is obvious that, to estimate the volume of water setting out of 

 Baffin's Bay, our observations should be limited to the north of 67 . 



The winter drift of the ' Terror,' in 1836-7, from Frozen Strait through 

 Hudson Strait into the Atlantic, appears to me to be due to wind alone, 

 since a polar current is there an impossibility, and that any considerable 

 current — during winter — issues from Hudson's Bay, is highly improbable. 

 From all that I have been able to observe during our winter drift down 

 the middle of Baffin's Bay to Davis' Strait, the ice movement was almost 

 entirely due to wind, and not to an arctic or polar current. 



As this is not the generally received opinion, I give a carefully pre 

 pared table of our monthly winds and drifts. The direction of duration 

 of the wind has been worked out like a day's work, the number of hours 

 upon each point of the compass being regarded as miles. The direction 

 of the force has been similarly obtained, but regarding the accumulated 

 hourly force (according to the Beaufort notation), upon each point, as 

 so many miles. The directions of duration and of force thus obtained 

 nearly agree ; and, compared with our true drift, show at once whether 

 other causes were at work in effecting the movement of the ice. 



