Atmospheric Circulation

ON March 9 and 10, 1887, the barometer rose to 30 92 inches over Iceland-a very exceptional height for that locality at that time of the year. The United States daily maps of the northern hemisphere show that a storm to the southward of this great anticyclone was carried westward a distance of over six hundred miles within twenty-four hours, in a manner similar to that in which West Indian hurricanes follow the course of the trade winds in August and September, although this storm was located in latitude 40° N., or in the usual situation of the anti-trades. Other instances of a similar character have been noted, but this one was unusually well defined, and throws much light upon the laws governing the atmospheric circulation.