432 Foreign and Miscellaneous Intelligence. 



In a note to the above paper, M. Poggendorff states, that on the 

 same day the needle also experienced great irregularities at Freiberg. 

 On the 5th of May, at 7 o'clock 20 min. P.M. (8 h. 28' of Petersburgh 

 time,) the needle was 2' 4 5" eastward ; from this time it moved in an 

 easterly direction, so as to have reached, at midnight, 21' 9", when 

 violent oscillations were observed, and the needle rapidly moved 

 westward, so as to be at 12 h. 15' A.M. 16' 14" west, and consequently 

 37' 20'' more westward than a quarter of an hour before : this was the 

 maximum of the westerly deviation at 12 h. 17' it had diminished 

 to 12' 0*. 



22. DESCRIPTION OF SOME ATMOSPHERIC PHENOMENA. 

 (Professor Strehlke, of Danzig.) 



On the 29th of last March, 1830, 1 observed the phenomenon of 

 coloured rings and parhelia, which, as I see from the papers, were 

 at the same time also seen at other places. It appears, that for some 

 time before and after the above date, the atmosphere was in a state 

 peculiarly favourable to appearances of this kind, for, on the 20th of 

 March, at 5 o'clock P.M., a large coloured areole had formed round 

 the sun about 45 in diameter ; the sky was covered with numerous 

 parallel strata of clouds, which appeared to converge towards the 

 sun, opposite to which they had another point of convergence. The 

 colours of the ring were dull red internally, and bluish externally. 

 On the 30th of March, at 10 o'clock P.M., a white halo of 45 had 

 formed round the moon. On the 9th of April, at 6 o'clock P.M., 

 the sun was surrounded by segments of an areole of 45 in diameter ; 

 on the 10th, at 11 o'clock A.M., it had an incomplete areole, from 

 the uppermost portion of which a white circle subsequently formed, 

 inclosing the zenith. But the most striking of all was the pheno- 

 menon observed on the 29th of March. On the 28th, the wind was 

 northerly, and in the night it froze ; on the 29th, the wind went 

 through east to south. The following table exhibits the meteorolo- 

 gical observations on these two days : 



Barometer at 0.46 



Thermometer. above the sea. 



28th of March, at 10 o'clock P.M. + 2.0 R. 339"'.41 



29th 8 A.M. 1.1 339 .25 ) Cloudy towards 



10 4.3 339 .041 east. 



12 6.2 338 .661 Cloudy towards 



2 P.M. 8.5 338 .22V south weak 



4 9.0 338 .99] sunshine. 



6 8.0 337 .87)Cloudy towards 



8 7.5 337 .63 J south. 



10 8.0 337 .29 Clear. 



30th 8 A,M. 7.0 335 .59 



At 3 o'clock 45 min. on either side of the sun, and at the dis- 

 tance of about 22 from it, there were two parhelia, the outer part of 

 which was white, the inner red; the horizon was rather cloudy, 

 * Poggendorff Annalen der Physik und Chemie. 



