PLEASURES OF THE TELESCOPE. 



741 



Another double that perhaps we had better not try with less 

 than four inches aperture is 84 Virginis. The magnitudes are six 

 and nine ; distance, o'b", p. %Vd. Colors, yellow and blue. 2 1846 



'A 



a< 



is a fifth-magnitude star with a tenth-magnitude companion, dis- 



tance only 4", p. 108. Use the five-inch. 1 . wo,^ 



And now we approach something that is truly wonderful, he 



" Field of the Nebula." This strange region, lying mostly m the 



