( ) 
fupernatans feparaveram, vifus eft mihi alius liquor, 
cum aqua non permiftus, vafis feparatorii fun- 
dum petiifle j hoc etiam edudo, inveni efie Oleum 
Macis, aqua ponderofius : Ita ut ex eadem planra, 
cademque operatione, Oleum difpari gravitate extraxe- 
rim. In fuperiore parte hujus Olei, aliquid cryftal- 
lin^ forms hodie hucluare videtur , attamen cujus 
generis fit fubftantia, five Camphora, five non, tempus 
• docdbit. 
P. S. 
Poftquam difFerentias inter noft urn Oleum Thymi 
coagulatum 5c Camphoram orientalem fupra defcrip- 
feram, Dorainus Johannes Manel , Ciiymicus, oftendit 
mihi Oleum Majoranas coagulatum, quod nuper, &C 
•inopinato in vafe, (in quo Oleum Majorans quinque 
annos alTervatum fuerat) invenit. 
Hoc Oleum coagulatum Majorans etiam eadem ex- 
perimenta, cun Oleo noftro T ymi coagulato, fubire 
volui, quod <5c fadum eft, & multum inter fe conve- 
nire reperiebam, ita ut hoc nihilo magis, qtram no- 
strum, nomen Camphors mereri, fatis fciam. 
III. Two Letters on the EjfeEls of Lightning, from 
the tffy'Verend Mr. Jof. WalTe, (Rettor of Aynho 
in Northamptonlliire, to Dr. Mead. 
W E are told by Mr. Jejfop , in the Tranfadions, 
that what the common People call Fairy Circles, 
are occafioned by Lightning ; but 1 think it has not 
yet been obferved, that they continue vifible 50 Y ears, 
and that no Compofition of Ufe in Fire-works will 
produce near fo lafting an EfFed, as I have expe- 
rienc’d. There feems to be fomething here, which 
Sulphur 
