OUR PRESENT KNOWLEDGE OF ISOSTASY 



43 1 



The 124 stations under consideration were arranged in five 

 groups, depending upon the topography. The anomalies with and 

 without regard to sign for the local and the three regional distribu- 

 tions of the compensation are shown in Table III. 



The mean anomaly with and without regard to sign for the 

 several groups and for the various methods of distributing the 



TABLE III 



Local and Regional Anomalies 



compensation does not throw very much light upon the question 

 of which method is nearer the truth, although a careful analysis 

 of the table will, it is believed, indicate that the distribution 

 regionally to the outer limits of Zone O, 166.7 km., is not as 

 probable as the local distribution of compensation or the regional 

 distribution out to the limits of Zone K, 18.8 km., or Zone M, 



