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SCIENTIFIC KlCSUl/rS ( >! ZIEGLEK i'ULAR EXPEDITION 



AZIMUTH 



The star transit observations were also used in determining azimuths. The results are as 

 follows : 



Azimuth of magnetic hut from astronomical observatory 



After the meridian mark at Cape Auk was established, February 12, 1904, numerous 

 measurements of the angle from it to the magnetic hut were made during the year 1904. The 

 mean value from these observations of the included angle was 55 58' 28". From the obser- 

 vations of the lower and upper culminations of the circumpolars Ursae Minoris and 19 H 

 Camel, respectively, on February 12, 1904, the correction to this angle on account of collima- 

 tion, azimuth, and inclination of axis deviations was o."i. Hence the azimuth of magnetic 

 hut from astronomic observatory by reference to the meridian mark on Cape Auk is S 304 

 oi' 32" W, a value agreeing very well with those obtained above. The resulting mean value 

 adopted is S 304 01' 34" W. 



REMARKS 



One of the difficulties encountered in observing at low temperatures was caused by the 

 accumulation, due to the condensation from the breath and the proximity of a warm body, of 

 small particles of frost over the different parts of the instrument. It is thought that the 

 irregular readings of the striding level are due more to the presence of ice particles on the axis 

 of the telescope than to any change in the inclination of the axis itself. This ice, which was 

 being continually deposited, was removed as far as possible by dusting the pivots at each level- 

 ing and by wiping them and the wyes at the beginning and middle of each time set (when the 



*As obtained from the least-square reductions. 



