Abstract
A STATISTICAL examination of ancient records of winter temperatures in Western and Western-Middle Europe led me to the conclusion, in 1904 and 1905, that periodicities of 44½ and 89 years have the greatest influence on the occurrence of mild and severe winters in this part of the world. These periodicities, undoubtedly related to similar fluctuations in the sun's activity, are especially manifest in lower winter temperatures at the beginning, and in higher winter temperatures in the latter part, of the periods. Thus, in the 89-year period 1828–1916, the winter temperature is generallylowerin the first and third 22-year interval, and comparatively high in the second and fourth; the interval 182–849 being the coldest, the interval 1895–1916 the warmest part of the whole period. Not only the monthly means, but also the frequency of mild and severe winters, show this periodicity.
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