ASTRONOMICAL OBSERVATORIES. 251 



nounces most difficult to separate, being distant from each 

 other less than half a second, are seen in the Cambridge 

 telescope distinct and round, and the dark space between 

 jfined. The components of Gamma 

 \ are distant from each other less than 

 ilso separated with equal distinctness. 

 Antares, estimated to be of the tenth 

 ich was discovered by Professor Mit- 

 ncinnati refractor, is quite conspic- 

 of 700. It was with this instrument 

 3d the eighth satellite of Saturn, two 

 liscovered by Mr. Lassell, of Liverpool, 

 ,n reflector of 21 inches aperture. He 

 sfactory micrometric measurements of 

 jptune, which is not known to have 

 ly other instruments except Mr. Las- 

 the Pulkova refractor. The minutest 

 neighborhood of the ring nebula of 

 JT Lord Kosse as difficult objects with 

 *, are seen in the Cambridge telescope. 





