f '49 I 
CHAP. XXV. 
Cheltenham Salt. 
W HEN this Salt is prepared for Exa¬ 
mination by Solution, its firft Shoot¬ 
ings at the Edge of the Drop are Radiations, 
(from a Number of very fmall Centers,) 
which fpread till they meet each other, 
whereby their Progrefs is for a while im¬ 
peded j but other Shootings foon begin 
from the Extremities of thefe, and proceed 
by fmall S.eps and Renovations reprefen ted 
at a, Plate V. Thefe Figures, however, fre¬ 
quently diffolve again and difappear, and in 
their Places larger ones of the fame Kind 
arife, as from their Ruins, fame what in the 
Form of Br-ufhes, fee b. Small Ramifica¬ 
tions like the Branches of fome of the Species 
of Mofs fhoot frequently from the Tops of 
thefe, as c attempts to (hew.--But all the 
above-mentioned Figures, which a fmall 
Degree of Heat produces, feldom occupy 
more than one Side of the Drop : the more 
folid Configurations which generally take 
up the other Side, not forming till near the 
End of the Operation. In the mean Time 
great Part of the Middle of the Drop be¬ 
comes filled with many fmall Figures, which 
appearing firft as Points, riling under the 
Eye imperceptibly, fhoot every Way afte.r- 
b 3 wards 
