In my paper on “The Meteorology of the Weddell Quadrant and Adjacent Areas”(Trans. Roy. Soc. Edin., vol. xlvii. p. 103) data referring to temperature, pressure, cloud, and wind force were given for the stations of Ancud and Point Gallera on the coast of Chili. Since the above paper was communicated to the Society the reduction of the observations taken thrice daily at the Chilian coastal stations has been proceeded with, the observations utilised being published in extenso in the annual volumes issued since 1899 by the Maritime Department of the Republic of Chili. On the completion of the analysis of the tri-daily wind observations at Ancud and Point Gallera some features of considerable interest presented themselves, the most marked being the pronounced monsoonal character of the winds at the latter station—a condition which, as we will see later, holds good between the parallels of 33° and 40° of south latitude along the Chilian littoral. Table I. shows the monthly percentage frequency of the winds at Point Gallera. a lighthouse situated in lat. 40° 01' S. and long. 73° 44' W., for the seven years 1899–1905.