ON THE PERIODICITY OF THE AURORA BOREALIS. 



245 



Giessen. Liebknecht. 



Giessen. Liebknecht. 



Giessen. Liebknecht. 



Paris. Maraldi, Reuss. 



Paris. Maraldi, Reuss. 



Reuss. [Also Jan. G,9,10,aud 11.] 



Paris. Maraldi. 



Paris. Maraldi, Reuss. 



Paris. Maraldi, Reuss, Weidler. 1 



Paris. Maraldi, Reuss. 



Silesia and Lusatia. Fisher. 2 



Polen, Prussia, and Hungary. 



Gottschling. 3 



Reuss. 



Upsal. Burman. 4 

 Marseilles. Gemynius. 6 



Schyllberg, Nericia. Hiorter. 



SchylXberg. Hiorter, Reuss. 

 Bohemia. Gemynius. 6 

 Copenhagen. 



Mark. Beckmann, Wolf. 

 Silesia and Prussia. Frobes. 

 Schyllberg. Hiorter. 

 Mark. Beckmann, Wolf. 

 Zurich. Kirch. 

 Zurich. Kirch. 

 Bohemia? Frobes. 

 St. Martin, Antillas? Frobes. 

 Oli I a a. Frobes. 

 Schyllberg. Hiorter. 

 Schyllberg. Hiorter, Reuss. 

 Mark. Beckmann, Wolf. 

 Schyllberg. Hiorter. 

 Reuss. 



Schyllberg. Hiorter. 

 Reichstadt, Bohemia. Rost. 

 Mark. Beckmann, Wolf. 

 Silesia. 

 18. Schyllberg. Hiorter. 

 " 30. Schyllberg. Hiorter. 

 * " " 31. Germany. Frobes. 



'Acta Erudit. Leipsic, 1717, p. 270, 1721, p. 168. 

 - De Insolito quodam Phoenomeno Kesraarkini &<:. viso. 

 3 Meteorologia Sacra. 

 * Acta Litt. Sueciae, I. 566. 



5 Gedancken uber den zu Leipsic, &c, entstandenen Nord- 

 schein. 

 "Acta Uratislav. 1718, p. 670. 

 7 Acta Phys. Uratislav. 1718, p. 810, 999, 1077, and 1901. 



'Acta Uratislav. 1719, p. 177, 316. 



2 Acta Erudit. Leipsic, 1720, p. 218. 



s Acta Erudit. Leipsic, VIII. 465, Suppl. II. 55, 338. 



4 Frobes thinks this appearance may have been a fragment 

 of a parhelion. 



5 Aurora Australis. 



e Acta Erudit. Leipsic, 1727, p. 499. 



7 In the original t/ucinum. 



8 Acta Uratislav. 1720, Pt. I. p. 184, Pt. II. p. 450. etc. 



