Note Back to Main Text — Chapter IX

To illustrate this, we found at Spion Kop (about 3,500 feet above the sea-level) that it was necessary to set the time fuse for any given range some 500 yards short to get the shell to burst at all before striking; and on the top of Van Wyk, fronting Botha's Pass (some 6,500 feet above sea-level) I had to allow the fuse 800 to 900 yards short of the range, and similarly at Almond's Nek. This is, I take it, due to the projectile travelling further against a reduced air pressure at any height than it does for the same sighting of the gun at sea-level, for which of course all guns are sighted. I should like to talk to experts regarding this as we are not quite sure about it up here.[6]