During the past summer of 1950 my wife and I spent from July 16-27 on a visit to Dhahran and its vicinity, and the following two days on Bahrein Island. We were the guests of the Arabian-American Oil Company and the Bahrein Petroleum Company. Both organizations were extremely cordial and cooperative to us and we have been most grateful for their generous hospitality. The weather at this season is hot around Dhahran but fairly dry with moderate winds from the north and northwest. Midday temperatures ran up to 110°F. in the shade. On Bahrein the temperatures were slightly lower but the humidity much greater, reaching close to saturation point at times.