and positions of 36 double and triple stars y (^c. 323 



No. VIII. R. A. 8^ q' ; Decl. 18M1' N. 



5" Cancri ; I. 24 and III. 19 ; H. and S. 90. 



continued. 



Mean Result. 

 Position 69'' 45' ^/ ( 15 Obs.) ; Epoch 1824.49 ; 

 Distance 6^195 (10 Obs.); Epoch 1824.22. 

 When this star was observed in Blackman-street, in 1824, 

 and again at this place in January of the present year, I re- 

 garded it as a new double star, and registered the observa- 

 tions of it as such ; a comparison however of the results with 

 the measures of f Cancri, leaves no room to doubt that the 

 two stars are identical. Our former measures were Position 

 68** 17' sf; Distance 6".24i ; Epoch 1822.14. Observations 

 however which immediately follow, show that the larger 

 star is itself double ; hence some suspicion as to the accuracy 

 of these and of former measures will naturally arise. 



Passy ; April 3, 1825 ; Seven-feet Equatorial. 



Triple ; A of the 7th, B of the 8th, and C of the 8th 



magnitudes. 



Measures of A B. 



The eye-pieces adapted to the micrometer hitherto used 

 with this instrument being inadequate to communicate to the 

 telescope sufficient magnifying power to enable me to pro- 

 cure measures of thivS interesting close double star, I applied 

 the micrometer of the Five-feet Equatorial,* which I had for- 

 tunately brought with me from England : the powers thus 

 obtained are 92, 157, 181, 327, 413, 5i3 and 787. As to the 



• To effect this change of micrometers, an alteration of the eye-tubes became 

 necessary; on this, as on evefj/ other occasion, Mons*". Gambey supplied my wants 

 so expeditiously yZwA. at the same time so' cotnpletely , that during my abode here, I 

 scarcely felt the loss of Mr. Troughton. The advantage of having a.Jirst-rate 

 Artist, resident within striking distance of our observatory, is almost incalculable. 

 Passy, Oct. 22, 1825. 



