The “Rollers” of Ascension and St. Helena

Abstract

YOU probably know that the United States Scientific Expedition under Prof. Todd has had occasion to stop here during the past two weeks. I have resided during this time continuously at the signal station on Cross Hill (altitude 870 feet), studying the clouds and winds with many important results. I have had an excellent opportunity to observe the “rollers” for which Ascension and St. Helena are famous, and I have been able to demonstrate convincingly to myself their nature and origin. I should be obliged to anyone who will tell me whether my following views have perhaps been arrived at by previous observers.