thoughts on Configurations and Cry ft ah. 4 7 
After the Cryftals about the Edges are 
grown large, and thofe farther within the 
Drop have like wife pretty nearly attained 
their full Size; in the Solutions I mean 
where fuch Cryftals do form; for feveral 
Kinds produce Configurations but no Crys¬ 
tals ; and, on the contrary, in Some few, 
viz. of Sal Gem, common Salt, &c though 
Abundance of Cryftals are produced, no 
Configurations at all appear : After, I fay, 
the Cryftals are formed, the Configurations 
begin to fhoot, proceeding Somewhat flow- 
ly at the firft: but they quicken by De¬ 
grees, and dart at {aft, in many Subjects, 
quite over the whole Drop, as fwift as 
Lightning ; and that efpecially if the Drop 
has been too much or over Suddenly heat¬ 
ed. Therefore when the Configurations 
once begin, the Eye fhould never be taken 
off, till they are entirely ftnifhed. Some 
Defcription of them is given under each 
particular Subjedt, and they are reprefented 
in the Drawings, as the third Stage of the 
Procefs, ftgnified by c, D, <?, F, G, in the 
Alum Drop, and by c and d in the Drop of 
Ens Veneris. 
Thefe Configurations are no lefs con- 
ft a nt in their Forms than the Cryftals are, 
infomuch that each Subjedf is eafily dif- 
finguifhed by them. Tney feem com poled 
like wife of the fame tranfparent flaming 
Particles; but the Figures they produce 
are 
