(1) In a memoir on the correlation and variation of the barometric height at divers stations in the British Isles by Professor Karl Pearson and Dr. Alice Lee, it is suggested (i) that interesting results might be obtained by correlating the barometer at stations on the east and west sides of the Atlantic, allowing an interval of time between the observations (see p. 459), and (ii) that with a certain distance between stations, the correlation; would be found to be negative, i. e ., a high barometer at the one station corresponding to a low barometer at the second (see p. 467). (2.) In order to deal with these points, steps were taken m 1897 to collect the necessary material. Twenty years, 1879-1898 inclusive, were selected for consideration, and the early morning barometric observations for these years, copied from material provided by the kindness of the British Meteorological Office for the following East Atlantic stations:— Bødø, Florø, Skudesnaes, Valencia, Lisbon, and Funchal. These give a very fair chain of stations from the north of Norway to Madeira. On the west side of the Atlantic we obtained data for the same years for Halifax and Toronto by aid of the Director of the Canadian Meteorological Service.