358 COSMOS. 



by Galle, at Berlin, on the 23rd of September, 1846. These 

 important discoveries have not only tended directly to extend 

 and enrich our knowledge of the solar system, but have 

 further led to numerous other discoveries of a similar 

 nature ; as, for instance, to the knowledge of 5 other interior 

 comets (of Biela, Faye, De Vico, Brorsen, and D' Arrest, 

 between 1826 and 1851), and of 13 small planets, three 

 of which, Pallas, Juno, and Vesta, were discovered from 

 1801 to 1807, and after an interval of fully thirty-eight 

 years, since Hencke's fortunate and preconceived discovery 

 of Astrsea, on the 8th of December, 1845, the 9 others 

 were discovered, in rapid succession, by Hencke, Hind, 

 Graham, and De Gasparis, from 1845 to the middle of 1851. 

 The attention of observers has of late been so extensively 

 directed to the cometary world, that the orbits of 33 newly- 

 discovered comets have been calculated during the last eleven 

 years ; hence, nearly as many as had been determined during 

 the previous forty years of this ceatuiy. 



