OBSERVATIONS OF HERSCHEL AND LORD ROSSE. 



In fig. 54 is represented a nebula situated in E, A 23 U 18, 

 x P D 48 24', as drawn by Sir John Herschel, who describes it as 

 a fine planetary nebula. With a power of 240 it was beautifully 

 defined, light, rather mottled, and the edges the least in the world 

 unshaped. It is not nebulous, but looks as if it had a double 

 outline, or like a star a little out of focus. It is perfectly 

 circular. 



Fig. 55 is the same object as shown in Lord Ilosse's telescope, 

 16th 19th December 1848. A central dark spot surrounded by a 

 bright annulus. 



In fig. 56, p. 1, vol. viii., is a nebula situate in K A 20 h 54 m , <K p i> 

 102 3'. Diameter 10" to 12" according to Herschel, but 25" by 17" 

 according to Struve, who gives it a more oval form. This figure 

 is that given by Sir John Herschel, who describes it as a fine pla- 

 netary nebula with equable light and bluish white colour. 



Fig. 57, p. 1, vol. viii., is the same object as shown by Lord Ilosse's 

 telescope, iike a globe surrounded by a ring such as that of 

 Saturn, the usual line being in the plane of the ring. 



In fig. 58 is a nebula drawn by Sir J. Herschel, situate in R A 



7 h 19 m 8 s , N PD 68 4-5'. Describee! as a star exactly in the centre 

 of a bright circular atmosphere 25" in diameter, the star being 

 quite stellar, and not a mere nucleus, and is a most remarkable 

 object. 



Fig. 59 is the same object as shown by Lord Ilosse's telescope 

 on 20th February, 1849 ; described by him as a most astonishing 

 object. It was examined in January 1850, with powers of 700 

 and 900, when both the dark and bright rings seemed unequal in 

 breadth. 



43 



