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XIV. Ohfervations on the Manna Perficum : 
By John 'Fothergill, M. D. Licentiate of 
the College of Phyficians^ London. 
docs not appear very plain, from 
with Additions. 1 any thing that has occurred to me in 
the Writings of the elder Greek Phyficians, that they 
were much, if at all, acquainted with any Subfiance 
that now goes under the Name of Manna . They 
had the Term, but applied it to a Subjed very dif- 
ferent from what we do at prefent. The £ T7 to<7«o'/x<x 
AiCccvcoIh, or the Mica thuris concnffu elifa , the 
Bits broke off from the Olibanum in Carriage, was 
die Subftance they knew by that Name. 
If the Arabians did not firft of all introduce fame 
Kind of purging Manna into Pradice, they at lead 
render’d the Ule of this Drug more common and 
extenfive. Their Country afforded feveral Species 
of it; which being familiarly known, is, perhaps, 
the Reafon why no Defcriptions have been left fuf- 
ficiently clear, whereby to diftinguifh them from 
each other. Whoever has confulted the Arabian 
Writers, or the bed of their Commentators, will 
allow that their Accounts are defedive. 
That they had three Sorts of this Drug, didin- 
guiflied by the Names of Manna , Tereniabin , and 
Siracofi , is certain ; but whether thefe are now 
known, or by what Appellations, has been very 
much difputed. 
Rauwolf in his Itinerary publifhed by Ray , and 
Tournefort , in his Voyage to the Levant , have given 
the cleared Intimations of any Writers that I know 
of: 
