48 OLDHAM: THE STRUCTURE OF THE HIMALAYAS, ETC. 



Table 9. — Comparison of the Deflections produced by the Imaginary 

 Range for uniform compensation to depth 1 13'7 km., with those 

 which would be produced on the hypothesis of support hy simple 

 flotation, using Fisher's constants t 







Uniform 











COMPENSATION 



Simple flotation. 



Stai 



ION. 



TO 113'7 KM. 









Deflection. 

 — 11 



Deflection. 

 — 14 



J )i (Terence. 





10 



— 3 



— 



9 



— 13 



— 17 



— 4 



— 



8 



— 16 



— 19 



— 4 



— 



7 



— l(i 



— 20 



— 4 



— 



6 



— 17 



— 21 



— 4 



— 



5 



— 18 



— 22 



— 4 



— 



4 



— 19 



— 22 



— 3 



— 



3 



— 20 



— 23 



— 3 



— 



2 



— 21 



— 24 



— 3 



— 



1 



— 24 



— 27 



— 2 









— 53 



— 56 



— 3 



+ 



1 



— 15 



— 16 



— 1 



+ 



2 



— 8 



— 8 







+ 



3 



— 5 



— 5 







+ 



4 



— 3 



— 3 







+ 



5 



— 2 



— 2 







+ 



6 



— 1 



- 1 , 







+ 



7 



- 1 



- 1 







+ 



8 



(i 











+ 



9 















-j- 



10 















is the consequence of the greater average depth of the centre of 

 compensation, but these differences are greater within the range than 

 at its southern edge, and show a maximum at about 50 miles in. 

 Moreover, the differences must be regarded as minimum values, 

 since Mr. Fisher's constants, though arrived at by him on grounds 

 independent of the particular hypothesis of mountain formation 

 and support, represent a minimum value for the thickness of the 

 crust and a maximum value for the difference in density between 

 the crust and the underlying magma. If instead of 25 miles for 

 the former a thickness of 30 miles is assumed, and instead of a 

 difference of density such that for each 1,000 ft. of elevation re- 

 presenting 1-8 miles it be taken to represent 3 miles of " root," values 

 which are not beyond reasonable limits, then the " residuals" become 

 —V at the station 0, — 8" at station — 5, and — 6" at station —10. 



I 196 ] 



