[ 49 6 ] 
lengths, as reprefented by b, by in the figure marked 
large cryftals of neutral fait of plums, where they 
were run together, their figures were moft irregu- 
lar as at i, i j fome few lmall ones were fquares, as 
at b, k. Hence we fee what a variety the different 
methods of cryflallifation make in the figures of 
thefe falts. 
Experiment XI. 
With the acid of mulberries. 
Three quarts of the pure juice of the mulberry 
being faturated with four ounces of the fofiil al- 
kali, filtered, clarified with the whites of eggs and 
evaporated, yielded a faline matter, mixed with a 
quantity of a mucus and oil ; which, on being puri- 
fied as much as poflible, by lying on a fpongy 
brown paper, exhibited a very fine granulated fait 
almoft like fea fand, in which no regular-formed 
crvftals were to be obferved. 
Some of this fait being again diffolved in water, 
evaporated and cryftallifed a fecond time, appeared in 
the tea cup like a cake made up of the fame fort of 
fine granulated fait as reprefented at a, a , fig. 1 1 ; — 
and another parcel b , b> which was treated in the 
fame manner, though it at firft appeared rougher, 
and more of a cryftalline form, yet on examination 
was found to be made up of the fame fort of faline 
matter. — On taking out the cake, there were a few 
thin very fmall fquare cryftals, fuch as thofe marked 
c, c, c, auhering to the bottom of the tea cup. 
A (mall quantity of the faturated juice of the 
mulberries having been left by accident for ten or 
twelve 
