Note 13 — Chapter IX · OTHER SIMILAR SHRINES ELSEWHERE.
Reading edition
From a magnetic chart which has been prepared for me by the kindness of Captain Creak, R.N., F.R.S., of the Hydrographic Department of the Admiralty, it seems that the variation at Nineveh and Babylon may be taken as follows:—
Nineveh. Babylon.
1800 8° 25′ W. 8° 25′ W.
1900 0° 0° 25′ W.
The values for intermediate dates may be roughly arrived at by an interpolation curve.