MICROSCOPIC DRAWING AND ENGRAVING. 
fig. 16, in which the same object is shown as it was afterwards 
seen with the great telescope of Lord Rosse. 
Lord Rosse thinks that the brilliant convolutions of the spiral 
shown in his telescope, are identical with the split or divided part 
of the ring as seen by Sir John Herschel, and he further observes, 
that with each increase of optical power, the structure of this 
object becomes more complicated and more unlike any thing, which 
could be supposed to result from any form of dynamical law of 
which we find a counter-part in our own system. 
Before dismissing this very interesting subject of telescopic 
tests, w r e shall indicate one other, scarcely less remarkable. In 
fig. 17, is shown a small annular nebula, of a slightly oval form, 
observed and drawn by Sir John Herschel; the dark space in the 
centre of the ring he described to be filled with nebulous light, 
and that the edges were not sharply cut off, but were ill-defined, 
and exhibited a curdled and confused appearance, like that of a 
star seen with a telescope out of focus. 
60 
Fig. 15. 
