viii INTRODUCTION. 



the nature of the coast for the use of Lieu- 

 tenant Parry. That in the journal of our 

 route, I should register the temperature of 

 the air at least three times in every twenty- 

 four hours ; together with the state of the 

 wind and weather, and any other meteoro- 

 logical phenomena. That I should not 

 neglect any opportunity of observing and 

 noting down the dip and variation of the 

 magnetic needle, and the intensity of the 

 magnetic force ; and should take particular 

 notice whether any, and what kind or de- 

 gree of, influence the Aurora Borealis might 

 appear to exert on the magnetic needle ; 

 and to notice whether that phenomenon 

 were attended with any noise ; and to make 

 any other observations that might be likely 

 to tend to the further development of its 

 cause, and the laws by which it is go- 

 verned. 



Mr. Back and Mr. Hood were to assist 



