
Lea. IV. Salts of PI ants, 
Black. Thorz, Common Wormwood, Afh, and Tartar. All which diffol- 
ved feverally in fair water, I expofed in a Chamber window, and 
not in Winter, as before, but inthe heat of Summer, /2. on the 19 of 
Fuly, to evaporate of themfelves. 
4. g. The Effect was, That the third day after their being ex- 
pofed, the Efential Cryftals began to fhoot-in three of the Solutions, 
je. in that of Rofemary, of Garden Scurvygrafs, and of Black Thorn. . 
On the fouth day, in that of Wormwood. On the fifth day, in that of 
Afh. Yn that of Tartar, not at all. 
5. §. Thefle Efential Cryftals began, in all, to fhoot at the top, and 
then to fall to the bottome; as in the Experiment before. But as there 
was very little of the white Sedement before mentioned, that preceded 5 
So no Scum or Cremor at all. Which although a more perfect Calcina- 
tion, it feems, did here almoft prevent 3, yet did not in the leaft deftroy 
the aforefaid E/ential Salt, but rather make way for its more {peedy and 
copious Produifiow : exhibiting likewile a diftin@ Species in feveral of 
the Solutions. 
6. §. For firft, the Cryftals of Rofemary (the largeft of then) 
were about the bignefs ofa Rice-Corm, In Figure almoft likea T7p-Cat, 
which Boys play with, fplit down the midle. Each Zip being cut into p,, 9 
5 fides all ending in a poynt: the midle part divided into 7, all drawn 3° 
by parallel Lives ; the topmoft with the lowermoft but one, on each 
fide, beeing three exact Squares. 
7. §. The Cryftals of Black Thorn are moft of them poynted with 
jult fix fides of Equal meafure: very like to the fkooting of true 
Cryftalit (elf. From the topmott of which fix Sides, a Live being drawn Tab, 83. 
out, runs parallel toa broad Ba/é, whereon each Cry/al ftands. So 
that they are in fome fort of a Rhomboid Figure. i 
8. §. The Cryftals of Scurvygrafs have alfoa very elegant and regu- 
lar Figure, whichis in a manner compounded of the two former now 
defcribed.. But they are nothing near fo bigg, the largeft of them, 
being no biger than a Graiz of that which we call Pearl Barley. 
g. §. The Cryftals of Wormmood have alfo very many of them a 
regular Figure 5 but quite different from that of the CrySfals before 
mentioned 5 each Cry/#al being’a little Cylinder, faving that it is con- 
{tantly fomewhat {maller at one end,than the other:as it were one half, 9 
of a Rowling-pin. And not evenly Circular, but cut out by Six Sides 3° 
of equal Meafure: almoft asin the Cry/tal of Nitre. So that contrary to 
what is feen in the forementioned Cry/tdls, the ends of thefe of 
Wormwood are not poynted, but flat 3 and cut at Right Angles with 
the Sides. 
10.-§. The Cryftals of Af, though by their properties they appear 
likewife tobe Effextial; yet are nothing near fo regularly figurd, as 
all the forementioned. 
11. g. The Colour alfo of the faid Cryffals is fomewhat different : 
Thofe of Af being of a browz tranfparency, almoft like thofe of Firze. 
Thole of Wormwood being alfo brownifh, but paler. Thole of Rofe- 
mary and Scuraygrafs having fome little Tindure, yet very clear. But 
thofe of Black Thorz without the leaft Timéfure, and as clear as Cryitat 
it felfi ; 

2 65 


Rr §. 12, 
























































