Their advent this year was telegraphed to Paris by the New York "Herald," whose weather reporter was probably quite ignorant of any ecclesiastical traditions connected with the matter. On May 11 the following despatch was received in Paris: "A great depression, having its centre in the neighborhood of Lake Ontario, will be followed by a cyclone of great extent, travelling in the direction of Halifax, It will probably occasion great changes of temperature along the coasts of Great Britain and France, beginning May 12 and continuing till May 14." Never was prediction better fulfilled. The Ice-Saints sank the French thermometer to 6° Centigrade, corresponding to 21° Fahrenheit, a temperature more severe in those latitudes than the cold of an ordinary Christmas. When the Ice-Saints had departed the weather grew mild again. M. Quetelet, the head of the Observatory at Brussels, has paid great attention to the periodicity of weather-changes in Europe. The result of his investigations is as follows: I. That there is always a "cold snap" between the 7th and 11th of January, during which ordinarily occurs the coldest day of the year. II. That from January 22 to March 1 there is, as we say in our vernacular, "a let-up" on the coldness of the temperature. In France there is no ground-hog, or, if there is, he so generally sees no shadow upon Candlemas (February 2) that the three weeks succeeding it are called _L'Été de la Chandeleur_. III. In April cold may be expected from the 9th to the 22d, and the Ice-Saints may prolong their influence to May 23, after which there is no more possibility of frosts in France, though within my memory June frosts have been twice known in Maryland and Virginia. The prolonged frost in May is said to be produced by an understanding between the Ice-Saints and what is called in France _La Lune Rousse_,--the Red Moon. IV. Though it needs no prophet to foretell hot weather from June 6 to June 23. M, Quetelet's observations point to June 13 and June 22 as days of exceptionally high temperature. V. Between July 4 and July 8 comes the hottest day of the summer, which is not to be looked for in the dog-days, which are from July 21 to August 20. VI. July 25 distinguishes itself by being cool, and August 25 tempers ten days of heat which commonly begin on the 15th of August. VII. September 14 and September 30 are days when the thermometer may be expected to make a sudden fall. VIII. Cold weather may be looked for from October 20 to October 29, and from November 10 to November 19; but in the first ten days of November comes what we call Indian summer, and the French _L'Été des Morts_,--because it succeeds All-Souls' Day,--or _L'Été de Saint Martin_. M. Quetelet adds no observations on December, it being presumably a cold month everywhere.