ERRATA ET ADDENDA. 351 



On page 243, line 4, for decimal, read decennial. 



Also, in note 1, to Astronomischen Nachrichten, add Vol. XLVII. p. 286. 



On page 251, to the two auroras observed at Paris on October 16 and 17, add the year 1795; and for 

 October 16 and 17, read October 17 and 18. 



On page 255, to the observations at Nova Zembla in 1834 may be appended the following note: Durant 

 tout 1'automne pendant les nuits sereines ou peu nuageuses il y avait souvent des aurores. Annuaire 

 Magnet, et Meteor, de Russie, 1845, Supplement. 



On page 258, in note 2 on right hand, to Fortschritte der Physih, add fiir 1847, p. 179. 



On page 289, it may be remarked in reference to the year 1859, that auroras are mentioned as occurring 

 on February 11, 12, 14, and 18, July 18 (australis), August 2 and 25, and on October 13, which are not in 

 any of my catalogues. Vierteljahrsschrift der Naturforsch. Gesellsch. in Zurich, V. 239. 



From 1772, when the new style was used in recording the St. Petersburg observations, as far as page 65, 

 the printed dates of this catalogue are eleven days in advance of the correct dates. 



In my paper on the Secidar Periodicity of the aurora, in Volume IX. p. 120 of these Memoirs, in the 

 record of Dr. Hale's observations, for June 14 and 19, 1839, read January 14 and 19. 



Auroras were seen in Upsal, Sweden, on February 18 and 19, September 15, October 16, November 29, 

 1855. Nova Acta Pegios Soc. Scientiarum Upsaliensis, S. III. Vol. II. p. 257. 



Auroras were seen by J. W. Lovering, on August 14, in Lat. 54° N., Long. 21° 36' W. ; near the Orkney 

 Islands on August 18 and 19 (the latter feeble); in the Gulf of Finland, near Cronstadt, on October 11 

 and 12, 1866. 



Note. — It should be stated that pages 25 to 200 inclusive were printed previously to January, 18GG ; pages 201 to 

 216 inclusive previously to November, 1866; pages 217 to 248 inclusive previously to May, 1867; pages 218 to 304 

 and pages 1 to 8 inclusive previously to September, 1868; pages 305 to 344 inclusive previously to August, 1870, and 

 pages 345 to end previously to May, 1871. 



