The Arneiican Meteorological Journal, desiring to direct the attention of studen ts to tornadoes, in hope that yaluable results mav be obtaiued, offers the folio wing piázes: For the best original essay on tornadoes, or (lescnption of a tornado, $200 will be given. For the secund best 150. And among those wqrthy of special mention $50 will be divided. The essays must be sent to either of the editors. Professor Harrington, Astronomical übservatory, Ann Arbor, Michigan, or A. Lawrence ftotch. Blue Hill Meteorological Observatory, Keadville, Mass., U. S. A., before the first day of Julv, 1889. I'hey must be signed by a nom de plume. and be accompanied by a sealed envelope addressed with same nom de plume and enclosing the real name and address of the author. Three independent and capable judges will be selected to awaid the prizes; and the papers receiving them will be the property of the Journal offering the prizes. A circular giving f ulier details can be obtained by application to Professor Harrington.