142 WHITE LUNAR RAINBOW. 



the interval comprised between the time at which 

 it was first perceived, and the period of its final 

 disappearance, did not exceed five minutes. A 

 part of the cloud on which it had been exhibited 

 was speedily brought overhead by the high wind, 

 and discharged a large quantity of hail, with a 

 little snow intermixed. The hail was quite 

 opaque; but whether the phenomenon is to be 

 attributed principally to this circumstance or not, 

 I leave for those, whose knowledge of optics is 

 more profound than my own, to determine. 



It would be interesting to inquire into the 

 atmospherical peculiarities which have attended 

 lunar and solar bows, devoid of colour, observed 

 on former occasions. 



