1304 
Parts of the world. | 2 P | fien =S 
1. North Polar Area | + 2.44 — 0.02 =- 0,03 
2. Europe | — 0.83 | + 0.39 — 0.47 
| 3. Asia = del, |e ale see 
| 4, North-America == S04) == 1036 — 1.28 
5. Northern Atlantic Ocean — 5.00 | — 0.23 | — 11.36 
6. South-America + 3.21 | — 216...) F oe. 
7 Southern Atlantic Ocean ee ee re rere 
8. Africa Kn ae er de KI 
9. Indian Ocean — 2.58 + 15.11 + 7.09 
10. Indian Archipelago and Australia — 2.14 | ate ely bce) been MA a 
11. Pacific Ocean — 29.97 — 17.96 + 17.97 
| 12. South Polar Area AT = WOE aoe 
is due to the remarkable fact that the great mountainous regions 
of the earth (Himalaya, the Alps, Rocky Montains, the higher part 
of South Africa) are situated on or near the neutral latitude of which 
the sine is V1/, [p = 85°.3]. 
The value of dH found here is not yet exact, for if the crust 
were built according to the theory of Crairaur it would consist of 
a solid erust covered by an ocean of a mean depth of about 2.4 km 
In the above computation this ecean has been taken of the density 
2.73 instead of 1.03. To remedy this we must apply a correction, 
which by the theory of CrarRAUT is 
by 
l 
d, (C—A) = # a {a pe dp = $, a. 2.4 (5 Jm) be. 
di 
[sa 
This gives 
; dH = + 0.00000213. *) 
The bottom and the surface of this ocean would be ellipsoids of 
revolution, the neglect has therefore no effect on the value of B— A. 
There now remains 
JH = — 0.00000299, 
1) There is an error of computation in this number. It should be +0.00000260. 
The final value then becomes e—! = 295.98. The difference from the value in the 
text in negligible. (Added in the English translation.) 
