158 Mr. South's observations of the apparent distances 

 No. DCV. continued. 



crystallisation on the exterior surface, have been so considerable, although an 

 attached deal tube projects twelve inches beyond it, that I have been obliged to 

 remove it very frequently ; but no trouble is too great to obtain measures, under 

 circumstances so peculiarly favourable. Tvi^enty stars have been observed, amongst 

 them several of the most difficult, and some which I have never before seen double. 

 Now however the dew is not confined to the parts of the telescope in the neigh- 

 bourhood of the object-glass, but has attacked the wires of the micrometer; they 

 have a serrated appearance ; and I suspect begin to ** fiddle." Prudence advises me 

 to relinquish observing, lest by persevering they should become broken. Many 

 nights since my abode here, the dew has been far more copious, than I ever ob- 

 served it to be in England ; frequently the water has dripped off the instrument for 

 several successive hours, but I never had any reason to suspect the slightest preci- 

 pitation of moisture on the micrometer wires. The polar axis and object-end of 

 the telescope, which in the earlier parts of the night were covered with hoar frost, 

 are now coated with ice. ..^i^^^^a 



Mean Result. 

 Position 22<» 43' np (10 Obs.); Distance 5i".o22 (10 Obs.); 



Epoch 1825.01. 



No. D CVI. R. A. 9^ 47'" ; Decl. 200 si N. 



Struve, S5S ; Hist. Cash 212. 

 Double ; 8th and loth magnitudes ; small, blue. 



Passy ; January 2, 1825 ; Seven-feet Equatorial. 



Position = 85° 17' sf 5 Obs. I DifF. = 1° 8' ^ t^.^ , 

 Distance = zi^'.jzs 5 Obs. | DifF. = o".3i2 5 ^'^c"^*' 



Passy ; February 5, 1825 ; Seven-feet Equatorial. 



8th and 10th magnitudes. 



Position = 84° 6' sf 



S Obs. i DifF. = 



)ifF. = 1° 19' ) T,.- . 

 Distance = 3o".4i j 5 Obs. j DifF. = d'.s^g ] ^^*C"^*' 



Night very fine. Snow on the ground five or six inches deep. Thermometer in 

 the observatory stands at 27°. $. No dew on the object-glass.* 



Mean Result. 

 Position 84° 41' sf; Distance so".07i ; Epoch 1825.04. 



* To obviate the annoyance occasioned by the dew, wadding, such as is here 

 employed in the manufacture of Ladies' pelisses, was on February ist placed fo a 

 thickness of three-quarters of an inch, around the tube to which the micrometer is 

 attached, to that of wood applied to the object-end, and to all the telescope tube 

 projecting beyond the declination circle of the instrument : it has to a very consi- 

 derable extent answered the purpose. Passy, October 22, 1825. 



