( 778 ) 
Jlender pipe, we found the upper fuperficies of it to be- 
concave 5 almaft, if not altogether, like tbac which water, 
would have had in the fame pipe. Bucwhen I put a litde 
Water upon this Oil, it prefcntly changed the figure of its fur- 
face, which became vifibly, though notvery much^ protube- 
rant or Convex. 
Atid in regard this Oil, though heavier than Water , is not 
^ fo heavy as deliquated Saltof T^mr, 1 thought fic 
Ixf. V. to try, whether the P/'<^;?^wf';^^;^ would not be differ- 
ing upon the Contra of thofe two liquors ; and ac- 
cordingly having put feme Oil of Tartar into the flender pipe, 
and put fome drops of the Oil of Guajacum to it ^ we found, 
that this liquor did not manifeftly alter the Concave figure of 
the furface of the liquor Alcdi , as the Oil of Xurfentine had 
done: And having, forCuriofity fake, warily poured a little 
Water upon the Oil of Gmjacum ^ I found ^ as I had reafon 
tofufpeftj that the upper Superficies of it changed prefently 
from a Concaire Figure to a Convex, fothat this Oil in the 
niidft of the other two liquors appeared like a little red Cy- 
linder, which, inftead of having Circular ^4/^/, was protube- 
rant at both ends, but more at that which touched the Oil of 
tartar. 
To vary a little the Experiment , I put fome FJfemal Oil 
(asChyroifts call it) of Cloves into a new (lender 
Exp. VI. pipe, and having obferved it to be fomewhat Con- 
cave at the top where it was contiguous to the Air , 
we caufed a little Common water f perhaps a quarter of a 
fpoonful or lefs) to be put to it, and found , as we expefled, 
the furface of this Oil alfo to become tumid. And in regard 
this Liquor as well as the forementioned Oil of GuajMcum^ 
though it were fo heavy as to fink in water, wonld not do fo in 
deliquated Salt of Tartar, we did, into another flender pipe, 
put firO fjme of this laft nam'd liquor, then fome of the Aro- 
matic Oil, and laftly a little Common watery by which means 
we found, that t lie little Cylinder of Oil did, like that of the 
Oil of Guajacum^ appear convex at both ends ^ but was unlike 
it inoneCircumftance, that the Oil of Cloves appeared more 
convex at the upper end where 'twas contiguous to the water, 
than at the lower J that lean*d'upon the furface of the Oil of 
l^rtar. 
Having 
