Configurations ofi S ulllmate* 1 27 
with keen Edges that run tapering to a 
Point, and form an Inftrument like the 
long Head of a Spear exceedingly fharp- 
pointed, as at d. 
When the Water is nearly exhaled, 
another Sort of Configurations are formed 
very fuddenly, confifting of innumerable 
little Lines difpofed in a very curious and 
wonderful Manner, as the two Figures// 
endeavour to reprefent, And often (though 
not always) one or two Configurations 
Ihoot out, when one would think all over, 
refembling what is fliewn at g, but much 
more elegant and regular, and reflecting 
(I fuppofe from the extreme Thinnefs of 
the component Salts) with great Brilliance 
and Luftre all'the beautiful Colours of the 
Rainbow, if the Candle be placed to Ad¬ 
vantage. Which Circumftance, together 
with the Shape of this Configuration, in¬ 
duces me to call it the Peacock’s ‘Tail. 
The Configurations /f refled Prifm Co¬ 
lours alfo, but in a much lefs Degree of 
Perfection 
The Compartment B is intended to 
fhew, what happens frequently to this and 
many other Solutions, when a Drop is 
placed on a Slip of Glafs, for Examina¬ 
tion by the Microfcope: that is to fay, 
* All thefe laft-mentioned Configurations appear like 
delicate Engravings, and afford the prettieft Sight ima¬ 
ginable. 
fome 
