142 COSMOS. 



16h. 35m. 37s., N. Dccl. 36 47' ; first described by Halley 

 in 1714. 



A cluster of stars near w Centauri ; described by Halley as 

 early as 1677 ; appearing to the naked eye as a round cometic 

 object, almost as bright as a star of the fourth or fifth magni- 

 tude ; in powerful instruments it appears composed of count- 

 less stars of the thirteenth to the fifteenth magnitude, crowd- 

 ed together and most dense toward the center; R. A. 13h. 

 16m. 38s., S. Decl. 46 35' ; No. 3504 in Sir John Herschel's 

 catalogue of the clusters of the southern hemisphere, 15' in 

 diameter. (Observations at the Cape, p. 21, 105 ; Outlines 

 ofAstr., p. 595.) 



Cluster of stars near K of the Southern Cross (No. 3435), 

 composed of many-colored small stars from the twelfth to the 

 sixteenth magnitude, distributed over an area of Jj-th of a 

 square degree ; a nebulous star, according to Lacaille, but 

 so completely resolved by Sir John Herschel that no nebulous 

 mass remained ; the central star deep red. (Observations 

 at the Cape, p. 17, 102, pi. i., fig. 2.) 



Cluster of stars, 47 Toucani, Bode ; No. 2322 of Sir John 

 Herschel's catalogue, one of the most remarkable objects in 

 the southern heavens. I was myself deceived by it for sev- 

 eral evenings, imagining it to be a comet, when, on my ar- 

 rival at Peru, I saw it in 12 south lat. rise high above the 

 horizon. The visibility of this cluster to the naked eye is in- 

 creased by the circumstance that, although in the vicinity 

 of the lesser Magellanic cloud, it is situated in a part of the 

 heavens containing no stars, and is from 15' to 20' in diam- 

 eter. It is of a pale rose color in the interior, concentrically 

 inclosed by a white margin composed of small stars (four- 

 teenth to sixteenth magnitude) of about the same magnitude, 

 and presenting all the characteristics of the globular form.* 



A cluster of stars in Andromeda's girdle, near v of this con- 

 stellation. The resolution of this celebrated nebula into small 

 stars, upward of 1500 of which have been vecognized, apper- 

 tains to the most remarkable discoveries in the observing as- 

 tronomy of the present day. The merit of this discovery is due 

 to Mr. George Bond, assistant astronomerf at the Observatory 



* " A stupendous object a most magnificent glolular cluster," says 

 Sir John Herschel, " completely insulated, upon a ground of the sky per- 

 fectly black throughout the whole breadth of the sweep." Observations 

 at the Cape, p. 18 and 51, PI. iii., fig. 1 ; Outlines, $ 895, p. 615. 



t Bond, in the Memoirs of the American Academy of Arts and Sciences, 

 iiew series, vol. iii., p. 75. 



