ZONE OF PLANETS BETWEEN MARS AND JUPITER. 73 



the assistance of one of the ecliptical star-maps at present 

 in course of publication from Mr. Bishop's observatory. 

 It was not much over the tenth magnitude, which is 

 rather beyond the limit of the Berlin charts. Mr. J. C. 

 Adams, president of the Astronomical Society of Lon- 

 don, being requested to name the planet, proposed to call 

 it Calliope. 



On the 15th of December, 1852, another planet was 

 detected by Mr. Hind. It had a pale, bluish light, and 

 resembled a star of the tenth or eleventh magnitude, and 

 being not very far from perihelion, is probably one of 

 the faintest members of the group. Mr. Bishop, at the 

 request of Mr. Hind, has selected for this planet the name 

 Thalia. 



Thus, within a period of nine months, were discovered 

 eight small planets belonging to the group between Mars 

 and Jupiter, and four of them were discovered by Mr. 

 Hind of London, a fact altogether without precedent in 

 the history of astronomy a result not of accident, but 

 of a systematic and persevering survey of the heavens. 



On the 5th of April, 1853, Professor de Gasparis dis- 

 covered in the constellation Leo a very minute object, 

 estimated as not brighter than a star of the twelfth mag- 

 nitude, which on the following evening he recognized 

 as a new planet, in consequence of its proper motion. 

 This discovery was ascribed to the circumstance, that on 

 the 5th of April, 1851, very near to the place where this 

 planet was found, he had observed a star of the twelfth 



magnitude, which had subsequently vanished ; for which 



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