CHAP. 2. 19. RAINBOW, PARHELION, &c. 103 



figure extending from them : sometimes a large 

 semicircular band of light, like an inverted 

 arch, seems to rest upon the Halo which encircles 

 the sun : but these phaenomena vary too much 

 to be particularly described here : their pecu- 

 liarities ought to be minutely observed and 

 noted down in a Meteorological Journal. 



PARASELENE, Lunae imagofalsa, vel phi res 

 imagines hiyus generis circa Lunam dis- 

 posltae, et magls mlnusve halonivus aliisquc 

 lucldls vittls commltatae. 



The Paraselene, the Parhelion, and the 

 several kinds of Halo and Corona, all appear to 

 result from the intervention of cloud between 

 the spectator and the sun or moon, through 

 which the light passes : but there is another 

 well known phaenomenon, which always ap- 

 pears in a cloud opposite to the sun or moon ; 

 namely, the 



IRIS. Circulus maximus coloratus in nubc 

 Soil opposite! visits, et cujus centrum centra 

 Soils opponitur, qui, quod port io ejus tantnni 

 cldetur, arcus adparet. 



The llainbow is an appearance too familiar 

 to every one to need any particular description. 

 As the Halo and Corona appear generally in 

 the Wanecloud; so the Iris appears always 



