Note 75 — Chapter III
Reading edition
In particular, the adoption of the above three longitudes as of equal accuracy with Suez will lead to a better longitude for Jidda. The longitude of Jidda is at present fixed only by chronometer transport from Suez, a distance of some 650 miles; but by regarding Halaib as a fixed point the distance of comparison can be reduced to 150 miles. The data for this revision of the longitude of Jidda already exist in the Reports of the “Pola” expedition, and the discussion is certainly worth undertaking before any future surveys are conducted in the central portion of the Red Sea.