| | | | | 658 |Adar It |sharp peak.|21 47 1|36 19 14 | 1,170 | | | | | 409 | | beacon. |21 44 21|34 36 53 | — | | | | | 558 |Arit | peak. |21 40 26|36 22 50 | 1,529 | | | | | 559 |Arit | „ |21 39 25|36 22 32 | 1,772 | | | | | 663 |Karai Awa | summit. |21 39 18|36 10 21 | 1,056 | | | | | 562 |Arit | peak. |21 38 3|36 18 57 | 1,410 | | | | | 560 |Arit | highest |21 36 51|36 23 27 | 1,810 | | peak. | | | | | | | | 563 |Arit |high peak. |21 36 1|36 19 52 | 1,727 | | | | | 561 |Arit | W. end of |21 35 50|36 22 48 | 1,532 | | ridge. | | | --------+--------------------+-----------+--------+---------+--------- =Comparison of Positions determined on the Red Sea with those previously found in Official Marine Surveys.= It is interesting to compare the positions found for certain triangulation points with those determined by the British Admiralty surveyors and by Lieut. Koss, who accompanied the Austrian research-ship “Pola” in 1895-6.[74] The three best defined points of comparison are Berenice temple, the central peak of St. John’s Island, and Halaib Fort. In the case of Berenice and St. John’s Island the observation of the two prior surveys were made at stations a little distance from my triangulation points, but the published charts enable one to scale off the necessary corrections to reduce the positions to those of the triangulated points. At Berenice, the British Admiralty observation point, for which the latitude is given as 23° 56′ 16″, is 1′ 26″ north of the temple, so that the equivalent Admiralty latitude for the temple is 23° 54′ 50″. Similarly Lieut. Koss’s observation point, where the latitude found was 23° 56′ 27″, is 1′ 47″ north of the temple, giving the latitude of the temple as 23° 54′ 40″. My triangulation gives the latitude of the temple as 23° 54′ 39″, thus showing a remarkably good agreement with that found by the “Pola” observer.