86 Meteorological Observations. [August, 



During tlic nine years includt'd in the ])recc(ling tables, several 

 very singular lialoes, with and without parhelia, were observed, 

 among which the accompanying are wortliy of record. 



Fig. 1. Seen April 17, 1843, at 3^ o'clock, P. M. The circle 

 was white, the arc brightly ivised. 



iMg. 2. May 2, 1843, about 4 o'clock, P. M. Lasted one hour. 

 The j)ar[ielion on the north was partly obscured by a cloud. 



I''ig. 3. A double halo oljserved May 25, 1843. The inner cir- 

 cle faint; outer one irised. The j)arhelia on the sides were a 

 little lower than the sun. 5 o'clock, P. M. Lasted about one 

 hour. 



I''ig. 4. .September 6, 1843, at 7 o'clock, A. M., was seen the 

 detat(;he(l arc A, with its convex side towards the sun, and bril- 

 liantly irised. JJy 8 o'clock a prolongation on the eastern side 

 made the whole appear as in Fig. 5. The prolongation seemed 

 to be the arc of an ellipse. About 10 o'clock the phenomenon 

 presented the combination represented in Fig. 6. E Ji C F was 

 the arc of a circle having the zenith as its centre, of a faintly 

 white light. The circle G K II was white and distinct. The 

 ellipse (j J) L H was irised and brighter on the eastern side. At 

 the intersection of the horizontal ciicJe with the circle and ellipse 

 two parhelia were formed on eacli side, B A C I). 



Fig. 7. Was an irregular halo composed in i)ait of a circle and 

 in part of an ellipse, seen from near sunrise till 10 o'clock, on the 

 2nd of January, ]844. At A, in the elliptical arc C F, w^as a 

 parhelion, and another at Ji, to the east ol' the other, and exterior 

 to the halo. 



Fig. 8. A halo with an ellipse exterior to it, like Fig. 6, with 

 parhelia on the eastern side. .Seen April ]1, 1844. On several 

 occasions the halo, with an arc of an ellipse above and below, 

 have been observed. 



Fig. 9. Seen April 29, 1S44, soon after noon, and for an hour. 

 The smaller halo was by far the brighter, and very l)eautifully 

 irised, but more brilliant above and below^than on the sides. The 

 largei' having the zenith as its centre, was white and narrow, but 

 very distinct. The sky during the time that this phenomenon 

 lasted was very ])urc and serene. No parhelia were observed at 

 the ])oints of intersection. 



Fig. 10. Seen January G, 1846, at 8J o'clock, A. M. B II A 

 a common halo, very faint, having indistinct parhelia, each with 

 a conical tail on the side opposite the sun. C a very bright arc 

 of smaller radius. 1) F, F (i, arcs of larger haloes, ii ised but faint. 

 Preceded by a succession of frosty nights, and followed by rain. 



Fig. 11. A halo seen February 24, 184G. The external par- 

 helion irised. 



Fig. 12. Seen March, 6, 1847, about 4 o'clock, P. M., preceded 



