Comparisons of Magnetic Standards, 1905-14 



251 



The instruments used by Mr. Pearson were C. I. \V. magnetometer No. 5 and Dover 

 dip circle No. 177 (needles 1, 2, 5 and 6). 



Table 20 A. Results of DccUnalion Coniparinons nl the Potsdam Observatory, 1010. 



Table 20 B. Results of Horizontal-Intensity Comparisons at the Potsdam Obserralory, 1910. 



Table 20 C. Results of Inclination Comparisons at the Potsdam Observatory, 1910. 



Since the Potsdam Magnetic Observatory is generally used as a base station for the 

 magnetic work in Germany and her colonies, it will be desirable to strengthen, as far as 

 possible, the mean results found in Tables 20 A, 20B, and 20C. 



