By the fame Obfervation a much greater Error is 
amended in the Latitude of Aleppo^ in the Rudolfint 
Tables of Kepler ^ who fuppofes Aleppo to have been the 
Ancient Antmhia ad Taurum, and accordingly places it 
in Lat. 37 ^/(?g. lo win. wherein he is followed by 
lialdas 2ind others ; and feveral Maps have copied the 
Miftake, But a much greater ufe of it is, that thereby 
we are affured, that the City of Arabia, wherein Alia- 
tani made the Oblervations we have publifli'd in 
Numl. 104. was, without doubt, the fame which is now 
called Racca on the Euphrates ; of which Town an Ac- 
count may be feen in Rauwolfs Voyagest and which was 
not many Miles below the Place where our Travellers 
firft came on the River : And if Arecca^m the Language 
of this Country, relates to ViHory (as is (aid in pagA^'6,') 
k was, doubtiefs, anciently the City /^/ce/>^^r/£?», built 
by Alexander the Great', with which the Situation ex- 
adly agrees. The Latitude thereof was obferved by that 
Alhathi with great accuratenefs, about eight hundred 
years fince ; and therefore I recommend it to ali that 
are curious of fuch Matters, to endeavour to get feme 
good Obftrvation made at this Place, to determin the 
Height of the Pok there, thereby 10 decide the Contro- 
verfie, whether there hath really been any Change in 
the Axis of the Earth, in fo long an Interval which 
fome great Authors, of late, have been willing to fup. 
pofe. And if any curious Traveller, or Merchant re- 
fiding there, would pleaft to obferve, with due care, the 
fhafes o^xbQ Moons Eclipfes at Bagdat^ Aleppo and Alex* 
andria^ thereby to determine their Longitudes, they 
could not do the Science of Aflronorny a greater Service : 
For in and near thefe Places were made all the Obferva- 
tions whereby the Middle Motions of the Sun and Moon 
are limited : And I could then pronounce in what 
Proportion the Mooh\ Motion does Accelerate ; which 
that it does, I think I can demonftrate^ and fhali 
(God 
