NO. 6.] 



SLEDGE-EXPEDITION. OBSERVATIONS 1895. 



117 



The weather being still clear and calm with severe cold, the former value of ^fh may be 

 assumed, and dy = z/fe for noon ; the difference of 2' from morning to noon assumed above 

 being perhaps somewhat small, the morning latitude has been taken as 85 34', or dy = 6'. 

 As the observations were taken very near the prime vertical, its influence is very small. The 

 result is then: 



The meridian altitude, which gives y = 84 47', was taken at the camp of the preceding 

 day, while the other observations were made nearly 4 hours after the departure from this place. 

 Course nearly S by compass. The above values have been computed with f = 84 42', corres- 

 ponding to 6 miles advance in the 4 hours. 



Though the temperature was still very low, the weather had changed since the last ob- 

 servation. Some days before, snow had fallen, and the sky was now veiled. Assuming therefore 

 ^fh = d<p = 0, the mean of the results is 



LT-I = 7h 26m 40s an d E. Long. = 5h 6 45" - 4 = 76 41' - 4. 

 The magnetic declination has been computed by means of these values. 



1895, May 5. Bar. 29.90 in., Therm. - 22. 



The meridian altitude, which gives <p = 84 31', was taken an hour and a half after the 

 departure from a resting-place at which all the other observations were taken. For the morning 

 observations, 84 33' was assumed. The mean of the above values of LT I (which was used 

 for the observations by compass), supposing the dip of the horizon to have been normal, is then 



