Pro/. Cleaveland^s description of ffalos and Parhelia. 181 



Circumstances prevented the use oFa sextant in measuring tU* 

 ameters, distances, &c. but the circles with their intersections &c. 

 were, in general, so perfectly distinct, tliat the annexed figure 

 cannot, I think, be materially incorrect in regard to propor- 



tions &c. 



Explanation of figure 1. 



^, the true sun. 



5, », two parhelia, irised and very bright ; but their centres were 

 nearly of the same color, as the true sun. 



d, d, two white parhelia, very distinct. 



Ij a remarkably bright and beautiful parhelion, irised, and some- 

 what spreading, in consequence of the apparent contact of the 

 two halos. 



B, a very vivid and irised contact of the two halos ; but it did not 



seem to be a parhelion. 

 BO IN, an irised halo, having the true sun for its centre j yellow 



and red were the predominant colors. 

 ABC, a semicircular arc of a halo, touching the preceding at B; 



it was irised, but the yellow was less intense, than in liOUS". 



t 



DFSE, a bright, well defined halo, perfectly white, 



DH and DG. two arcs of halos. iutersectine at D, and extending 



to about H and G^ irised, but rather faint, 

 K, a small arc of an irised halo^ distinct, but not bright 

 L, another small arc, irised and much brighter, than the arc K. 

 a? y, a small irised arc convex toward BO IN, and touching it at I. 

 MP, an arc somewhat less than a semicircle, and perfectly resem- 

 bling a rainbow ; it was nearly east from the place of observa- 

 tion. 



.(,*■ 



