Tvof. Cleaveland's descrtjptwn of Halo s and Parhelia. 125 



S. Another phenomenon of the same kind was ohserved 



ipril 15, 1818. 



Explanation of figure 2. 

 S the true sun at an altitude of about 38". 



s,s two parhelia, irised and bright, about 45" from the sun. 

 d a white parhelion, SO" from the sun. 



B contempt of two halos, very bright, and beautifully irised j the 

 yellow being peculiarly distinct. 



lOBN irised halo, having the sun for its centre, and about 45" in 

 diameter. 



ABC irised halo, less than a semicircle, and touching the preceding 

 at B. Its radius appeared to be about 45". 



KZW irised halo, larger than a semicircle, passing through the 

 zenith, concentric with the halo ABC ; and evidently corres- 

 ponding to the arc K, in the halos, observed at Brunswick, 

 March, 1815. Its plane appeared to form an angle with k 



horizontal plane of about 85°. 



SFDE halo, perfectly white, passing through the sun's disc, par- 

 allel to the horizon, and having the zenith for its centre. 



Remarks, 

 The preceding phenomena were observed from 8h. 15m. to 



9h. 15m. A 



disappeared, in conseq 



of the formation of clouds in the south. The wind was blowins: 

 strongly from the N. E. The clouds exhibited the form of the 

 cirro-cumulus ; and reflected a strong and beautiful light, when 



passing over the halos. The space, included within the halo 

 10 BN was much darker, than the surrounding parts. On the 

 following morning s«ow fell in rounded grains. 



ir 



