CONCLUDING OBSERVATIONS 



I SHALL close this volume, with the reader's indulgence, 

 by a rapid sketch of the return of the Thomas to Hull. 



On the 24th of July, we started with a fresh breeze at 

 N., when eighteen ships were in sight all proceeding to the 

 southward. Then, for the first time since entering the 

 strait, a rainbow appeared : such a phenomenon is very 

 rarely seen in those latitudes, and its indication has not 

 been ascertained. 



The current was now running to the southward about two 

 miles or one mile and a half per hour : at other times, if a 

 strong wind blow, it is known to run nearly five miles an 

 hour : a heavy yellowish white fog bank lajr along the land : 

 this was about 72° N. 



For several days the wind continued N.E., which was 

 succeeded by a strong breeze at S. by W., which retarded 

 the progress of the ship very much, but which did not 

 last long : a cirrus radiation occurred, the shafts of which 

 were suddenly converted into cirrocumulus. 



In latitude 62° 40' N., the Cape Hen (procellaria gravis) 

 appeared : the ship was nearly in the same latitude on the 

 23d of the preceding April. 



On the 4th of August the wind became a steady breeze 

 at N.E. : latitude at noon by observation 60° 33' N. 



About the midnight of August the 6th, much lightning 

 8 



