6 3 8 



THE POPULAR SCIENCE MONTHLY. 



WESTERN PASSAGES, 

 via 43 latitude, 50 longitude. (Route Ko. 1.) 



VOYAGE. 



13 



20 

 21 

 22 

 28 

 29 

 30 

 36 

 37 

 38 

 44 

 45 

 46 

 47 

 53 

 54 

 55 

 62 



Month. 



July 



April 



May and June . . . 



July 



March 



May 



July 



March and April. 



May 



June and July. . . 



March , 



April 



May and June. . . 



July 



March , 



May 



June , 



April 



18 passages. 

 Average . . 



WESTERN PASSAGES, 

 via Southern Route. (Nos. 4 and 5.) 



VOYAGE. 



56 

 63 

 64 



65 

 71 

 72 

 73 



74 

 75 



Month. 



July 



May 



June 



July and August. 

 March and April . 



May 



June 



July. 



August , 



9 passages. 

 Average . 



and the comparative loss of distance as under 



Miles. 



Average distance lost each western passage 102 



Average distance lost in nine passages 918 



To compensate for which loss of distance, we have 



n. m. 

 Average of fog per passage on the northern route (track No 1) 18 41 



* West of longitude 70. 



f Between 23 and 33 west. 



