THE THEORY OF ISOSTASY 



617 



be varied, there seems to be nothing to show that a combination of 

 a decided under-compensation and shallow depth under land areas 

 with a practically complete compensation under ocean areas 

 would not prove, so far as present information is able to test it, 

 as close an approximation to the actual conditions as a combination 

 of complete compensation with a depth of 76 miles under both 

 land and sea. And it is not improbable that several combinations 

 involving a decidedly incomplete compensation under land areas 

 could be found which would appear equally as close to the truth 

 as M=i and ^ = 76 miles. 



Ring 



[Pul&z 



■ 5 

 19.29 kil. 



Kk = ii 3 .7 



kil. 



29 

 28 

 27 

 26 



25 



24 



23 



22 

 21 



20 



19 



18 



17 

 16 



is 

 14 



!3 

 12 

 II 



IO 



9 



8 



7 

 6 



5 

 4 

 3 

 2 



1 



996 



994 

 991 



975 

 965 

 95° 

 93° 

 900 

 860 

 809 



747 

 679 

 617 



57o 



539 

 520 



5io 

 505 

 502 

 501 

 500 

 500 

 500 

 500 

 500 

 500 

 500 



997 

 996 



995 

 992 

 988 



983' 

 976 



965 

 95i 

 93° 

 900 



859 

 801 

 721 

 618 

 493 

 358 

 234 

 139 

 077 

 040 

 020 

 010 

 005 

 003 

 001 

 001 



In the case of M>i, h^>^ miles it is probably also true that 

 the compensation under ocean areas would have to be taken com- 

 plete. 



In the foregoing discussion the distribution of compensation 



