Epfom Salt « 151 
from their Sides nearly perpendicular to the 
main Stem, thereby forming Figures that 
refemble the Branches of fome Species of 
Polipody: thefe are reprelented at e: but in 
others the Jaggs are fhorter, vid*. d. Now 
and then one of the main Stems continues 
{hooting to a confiderable Length, without 
any Branchings from the Sides, but at laffc 
fends out two Branches from its Extremity, 
as at g . Sometimes a Figure is produced 
having many fine and minute Lines radiat¬ 
ing from a Center, in the Manner {hewn at 
b. The laft Shootings in the Middle of the 
Drop may be feen at h, and are not unlike 
the Frame Work for the flooring or roofing 
of an Houfe, but with the Angles a little ob¬ 
lique : and fometimes a Form prefents itfelf 
like that fhewn at /. 
All thefe Figures mu ft be produced with 
a very finall Degree of Heat, for if the Drop 
be made too hot the Salt will not {hoot at 
all: but when once the Configurations are 
formed, the Salts fix, become fmooth and 
hard like Glafs, and may be preferved a long 
Time. 
The Subjed: above defcribed was not the 
true Salt of the Epfom Waters, which I knew 
not where to get; but it was I believe fome 
fort of Preparation like what is commonly 
fold under the Name of Epfom Salt, at a 
yery cheap Rate: though I gave a much 
--■**? - 1 1 4 larger 
