INSTRUCTIONS. 9 



concur, turn out to be correct, there is reason 

 to expect that the sea may continue open still 

 more to the northward, and in this event you 

 will steer due north, and use your best endea- 

 vours to reach the North Pole. 



In making this attempt you will be most 

 particularly attentive to ascertain the rate of 

 your chronometers, as, should you reach the 

 Pole, your future course must mainly depend 

 upon the accuracy with which you may be 

 able to carry with you the time at Greenwich. 

 If you should be so fortunate as to reach the 

 Pole, and the weather should prove favourable, 

 you are to remain in its vicinity for a few 

 days, in order to the more accurately making 

 the observations which it is to be expected 

 your interesting and unexampled situation may 

 furnish you with. 



Among many objects of science or curiosity 

 which are likely to present themselves at or 

 near this point of the earth's surface, you will 

 more particularly direct your attention to the 

 variation and inclination of the magnetic needle, 

 and the intensity of the magnetic force, and 

 how far it is affected by the atmospherical 

 electricity ; for which latter purpose you will be 

 furnished with an electrical apparatus peculiarly 

 constructed for this object. 



