SCIENTIFIC RESULTS OF ZIEGLER POLAR EXPEDITION 



The dip circle is of the usual pattern made for land observations by L. Casella of London, 

 England. 



In addition to these, the compass needle of a four-inch theodolite by Berger & Sons of 

 Boston, U. S. A., and the plane-table needles were used for the determination of declination 

 at several random stations. 



The following compilation of constants for the primary magnetic outfit has been prepared 

 by Mr. D. L. Hazard, of the United States Coast and Geodetic Survey, under the direction of 

 the Chief of the Division of Terrestrial Magnetism of that Bureau. 



MAGNETOMETBR CONSTANTS 



A new brass deflection bar was supplied in April, 1903, to take the place of the old one 

 not returned by the first Ziegler Expedition. It is a single straight bar 88 centimeters long. 

 The deflection distances, as determined by the United States Bureau of Standards, are 30.019 

 centimeters and 40.025 centimeters at 28. 75 Centigrade. 



The moment of inertia of intensity magnet No. 4 and stirrup has been determined several 

 times by Mr. W. J. Peters, as follows : 



The temperature coefficient of the intensity magnet has been determined by special obser va 

 tions at various times, as follows : 



From regular intensity observations values have been derived as follows : 



