THE LUAG'TXARY RANGE AND TROUGH. 



41 



Table 4. —Deflections produced by the Imaginary Range due to the 

 attraction oj the visible masses ; (I) uncompensated and (II) 

 compensated by Hayford factors for depth 1137 km. 



(Station 



I 



II 



No. 



Uncompensated. 



Compensated. 



— 20 











— 19 











— 18 



1 







— 17 



1 







— 10 



2 







— 15 



3 



1 



— 14 



6 



1 



— 13 



7 



2 



— 12 



11 



3 



— 11 



15 



6 



— 10 



23 



11 



— 9 



28 



13 



— 8 



32 



15 



— 7 



35 



10 



— 6 



38 



17 



— 6 



40 



18 



— 4 



42 



19 



— 3 



43 



20 



— 2 



45 



21 



— 1 



48 



24 







76 



53 



+ 1 



34 



15 



+ 2 



23 



9 



+ 3 



17 



5 



+ 4 



12 



3 



+ 6 



9 



2 



+ 6 



fi 



1 



+ 7 



4 







+ 8 



2 







+ 9 



1 







+ io 











0*7". It may be said that no reasonably admissible hypothesis 

 of compensation could increase this difference by more than about 

 1", and so the limitation of area, adopted for the purpose of sim- 

 plifying calculation, is justified, for the effect of increasing the area 

 would be much less in nature than in the artificial circumstances 

 assumed for this calculation. 



The same conclusion is reached by a comparison of the deflec- 

 tions, calculated as due to the Imaginary Range, with those of the 

 actual topography of the Himalayas, and this can readily be done, 

 since the necessary calculations have been made, for certain stations, 



I 189 I 



