Mr. tunst all’s Account of fever al Lunar Iris. 103 
exa&ly at the full, which ufed to be judged the only time 
they could be feen, though in the Encyclopedic there is an 
account that we idler obferved one in 1719, in the firft 
quarter of the moon, with faint colours, and in very calm 
weather. 
No lunar Iris, I ever heard or read of, lafted near fo long as 
that on the 1 8th inftaut, either with or without colours. 
