a name given, in astrology, to the moon.

ÆOLUS, in mechanics, a small machine invented by Mr Tidd for refreshing or changing the air in rooms when it becomes too hot or otherwise unfit for respiration. The æolus is so contrived as to supply the place of a square of glass in the window, where it works, with very little noise, like the sails of a wind-mill or a smoke-jack.

AEROLOGY is a branch of science which was de- Afghans, tailed in the Encyclopaedia at sufficient length, and according to the principles which were then generally admitted by chemists. Subsequent experiments, however, have shown that some of those principles are erroneous, and of course that some of the opinions advanced in the article Aerology are inconsistent with facts. These opinions must be corrected; but instead of dwelling this volume with a new article Aerology, we apprehend that it will be more acceptable to our scientific readers to refer them for those corrections to the article Chemistry in this Supplement.