ICEBERGS AND FOG IN THE NORTH ATLANTIC. 6 37 



EASTERN PASSAGES. 



Houks op Fog. 



Total. 



Hours. Min. 





 31 15 



8 

 42 9 

 IS 50 

 15 



18 7 



1 31 



Average distance 



sailed, 



per passage. 



Miles. 



2,987 

 2,979 

 2,967 

 2,979 

 2,973 

 2,997 

 2,991 

 3,019 



WESTERN PASSAGES. 



By the above tables the average hours of fog for each passage 

 show a decrease in the eastern passages from seven hours forty-nine 

 minutes in 1876 and ten hours thirty-two minutes in 1878, to three 

 hours, and three hours and thirty-seven minutes in 1880 and 1881, and 

 eighteen minutes in 1882 ; and between the sixtieth and fortieth me- 

 ridians, the ice-region, from an average of seven hours eleven minutes 

 in 1876 to one hour fifteen minutes in 1881, and an entire immunity 

 from fog in 1882 ; for the western passages a decrease from an aver- 

 age of thirty-seven hours fifty-four minutes of each passage in 1876 

 to four hours fifty-nine minutes in 1881, and three hours sixteen min- 

 utes in 1882 ; while in crossing the ice-region the average is reduced 

 from ten hours thirty-three minutes in 1876 to three hours thirty-three 

 minutes in 1881, and an entire absence of fog in 1882. 



Comparing the western passages via 43 latitude, 50 longitude 

 (route No. 1), with the extreme southern passages (routes 4 and 5), 

 the result is as follows : 



* One passage, southern route (track No. 4). 

 f Two passages, southern route (track No. 4). 

 \ One passage, southern route (track No. 4). 

 (track No. 5). 



Four passages, southern route 



