Mr Dunlop's Catalogue qf'NebuIce, Sfc. 283 



» 

 situated about 6" of a degree south and about 1^78 of time 



east of the Brisbane Observatory. The observations were 

 made in the open air, with an excellent nine-feet reflecting te- 

 lescope, the clear aperture of the large mirror being nine 

 inches. This telescope was occasionally fitted up as a meri- 

 dian telescope, with a strong iron axis firmly attached to the 

 lower side of the tube nearly opposite the cell of the large mir- 

 ror, and the ends of the axis rested in brass Y's, which were 

 screwed to blocks of wood let into the ground about 18 

 inches, and projecting about 4 inches above the ground ; one 

 end of the axis carried a brass semicircle divided into half de- 

 grees, and read off by a vernier to minutes. The position and 

 index error of the instrument were ascertained by the passage 

 of known stars. The eye end of the telescope was raised or 

 lowered by a cord over a pulley attached to a strong wooden 

 post let into the ground about two feet : with this apparatus I 

 have observed a sweep of eight or ten degrees in breadth with 

 very little deviation of the instrument from the plane of the 

 meridian, and the tremor was very little even with a considera- 

 ble magnifying power. I made drawings or representations of 

 a great number of the nebulae and clusters at the time of ob- 

 servation, several of which are annexed to this paper ; and also 

 very correct? drawings of the Nebulae major and minor, to- 

 gether with a representation of the milky nebulosity surround- 

 ing the star tj Robur Caroli. The places of the small stars in 

 the Nebulae major and minor, and also those accompanying 

 the ri Robur Caroli, I ascertained by the mural circle in the 

 year 1825, at which time I was preparing to commence a ge- 

 neral survey of the southern hemisphere. These stars being 

 laid down upon the chart, enabled me to delineate the nebulo- 

 sity very accurately. 



The nebulae are arranged in the order of their south polar 

 distances to the nearest minute for 1827, and in zones for each 

 degree in the order of their righ^ ascension. The column on 

 the right hand shows the number of times the object has been 

 observed. 



The reductions and arrangement have been principally made 

 since my return to Europe ; and I trust this catalogue of the 

 nebulae will be found an acceptable addition to that knowledge 



