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Effential and Marine Led. VI. 

CHAP. I. 
Wherein is fhewed, That the faid ESSENTIAL 
and MARIN E Salts of Plants are both of different 
Sorts. 
AVING madethe Experiment, that both an 
Effential and Marine Salt may be produced out 
of the Lixival Salt of a Plant. 1 thought it 
probable, that neither the one nor the other, 
was always the fame, but that as they had their 
general properties which made them to be of 
3] two general jkinds 5 fo they might have fome 
CS a) {pecial property, for the diftinguifhing of each 
—————_ kind into feveral Sorts. And withall, that 
in a warmer feafon, than before taken, the Tiyal hereof might be 
finifhed in a fhorter time. 
2. §. For the making of which, I conceived it requifite to remove 
an Opinion which feemed to lye in my way; fe. That there is little 
or no difference between the feveral Lixivial Salts of Plants, as fome 
Learned men have thought. But either there is a difference, or not: if 
not, it fhould be proved : and if there be,it fhould then be juftly {tated , 
what that difference is. For the doing of which, I chofe this Method, 1 
took an equal quantity of the whiteft and pureft Salts of divers Plants, 
all made by ari equal degree of Calcination ; and diffolved them all {e- 
verally in an equal quantity of water. And pouring likewife an equal 
quantity, as about 10 or 12 drops of each into a fpoon, I tafted them 

- feverally. Whereby it was very evident,that they were not all of one 
Taft, but of very different ones, both as to ftrength and kind: and 
therefore different in Nature alfo. The Sas I made tryal of were 
thofe of Sorrel, nile, Wormwood, Mallow, Afh, Tartar and others : 
and upon halfa Drachm of each I poured 3ij§ of water. The Solu- 
tions are here prefent to be tafted. By which the differences will ca- 
fily be obferved, and particularly that the Salt of Wormwood or Scur- 
aygrafs, 1s almoft as {trong again asthe salt of Avifé, or Sorrel: and that 
the Salt of Afh is above twice as ftrong, and that of Tartar above 
. thrice as ftrong, as that of Sorrel, and almoft thrice as {trong astthat of 
Worrwood or Scurvygraft. Sothat he who hall give half a Scruple, 
fuppofe of Salt of Tartar; inftead of half a Scruple of Salt of Worm- 
wood, or other like Set; he may as well give a Scruple of Rofiz of 
Jalap, for a Scruple of the powder, or almoft three] Drachms of Rhu- 
barb, or other like Purge, inftead of one. And the like is to be faid 
of other Lixivial Salts in their degrees, 
3. §, Having obferved thus much, I proceeded to repeat the for- 
mer Experiment, with fome ofthe aforefaid, and fome other Vegetable 
Salts, the beft calcin’d, and the pureft, that could be made for this 
purpofe, being thefe Six salts, fc. of Rofemary, Garden Scurvygrafs, 
Black 

