No. II. 



APPENDIX. 



3V 



To ascertain whether our mileage was proportional to the strength of 

 the prevailing wind, I used a simple formula dependent thereon, which 

 answered the purpose sufficiently well. 



Tr~-™,.i., f No. of hours in excess} v . .. c .„ I . .. _. 



Formula. | of prevaiiing wmd \ X its mean force X - = drift of free packed ice. 



For example: March, 1858. 24 -* 4 — 5 = 99-6 miles. 



10 



An ordinary fresh breeze (force 5), when blowing in the direction of 

 open water, would usually drift the pack twelve miles in twenty-four 

 hours. 



A Table of the Winds and Ice-Drifts experienced by the Arctic 



Searching Yacht 'Fox.' 



Index. 



