452 



Lieut. HerscheFs Examination of 



[June 18, 



tended ; 32® diam. ; blue."] Found at once, and seen in 

 finder. Not verj/ well seen in spectroscope : third line not 

 seen at all. 



No. 2197. March 26. ['^j? Argus and great nebula."] Spectrum easily 

 visible ; did not, however, succeed in separating the lines (low 

 al titude.) Estimated position D + T 8 Hh • 3 . 



No. 2581 . April 2. [" Planetary ; remarkable ; small j round ; blue ; equal 

 star 7 mag. ; V'd diam."] Well seen in spectroscope : eventu- 

 ally a short sharp bright line was seen, with a fainter com- 

 panion close by. D-f2-l+*l. 



No. 2917. March 26. [" Very bright ; large; round; barely resolvable."] 

 Not seen in spectroscope. 

 April 13. Not seen in spectroscope, though every precaution 

 was taken to secure direction and focus. It is almost im- 

 possible that this can have a bright line spectrum, or it 

 must have been seen. 

 April 23, Seen at once : bright ; all three lines easily seen, and 

 a fourth suspected, at intervals 1 : 3 : 10 ? from the first by 

 estimation. 



D + |'^^=D + 2-15. 



No. 3021. April 13. [" Very bright ; large; round."] Not seen in spec- 

 troscope. (See remark of this date for No. 291 7.) 



No. 3092. April 23. Very bright; considerably large ; pretty much ex- 

 tended, 63°."] Not seen in spectroscope. 



No. 3128. April 2. ["Cluster; large; extremely rich ; very compressed ; 



irregularly round ; well resolved; star 12 red."] Not seen 

 in spectroscope (adjustments suspected). 

 April 12. Not found in spectroscope. (Remark essentially the 

 same as for 2917.) 



No. 3132. April 12. [Remarkable; very bright; very large; extremely 

 extended, 92°."] No spectrum seen, though carefully placed. 

 Aprir26. Continuous spectrum suspected: linear spectrum 

 considered out of the question. (NB. Clear night, and other 

 spectra well seen.) 



No. 3525. March 25. [" Very remarkable ; very bright; very large; very 

 much extended, 122° ; bifid."] An irregularly shaped nebula 

 with dark space across it. No spectrum seen : faint stellar 

 spectrum seen. 

 March 26. Looked for again : no result. 



April 26. A good iiistance of the extreme difficulty of finding a 

 continuous spectrum object. I was enabled to find this one 

 by the help of a neighbouring star, whose spectrum was 



