C ) 
were taken by the bel-p of an Inflrument, whofe Linib w^s an Arch 
of ^ of a Circle of i o foot radm\ whereof he gives the Figure^ and 
bis aiaoner of reftifyingany Errors, which in ufing it might deceive 
him. 
In the ^^/^/^ Article he relates, that the ki^^e of Cajftofeu was 
the Starr he pitch't on. from whence to meafure thQ ^imtes and 
of a Degree in the Heavens ; adding the reafons, why he 
chofethat Starr. 
In the eleventh he gives the refolution of the thing in Quedion, 
that is to fayjHow manyToifes or Fat horns, P^r/^^;? mearure,anfwer 
aP^^r^^of Circumference of the Earth as for inftance, the 
Difference of Latitude between Mahoyjin and Sourdcn is found,by 
Obfervations madein the Heavens, to be 1 1'. 57^ 
B^tv^'tcn Mahojijh md Jmiens i. 22. 55. 
Now, the Meridian diftance between Mdvoyftn and Sourdon, 
calculated from Meafures taken upon Earth, was, Toifes, Feet, 
as may be feeeh above 3 * 60430. 3. 
Whence 'tis concluded, that 5 7064 Toifes and 3 feet, or, in a 
round number, 5 7 o 60 Toi fes are equal to a Degree, 
Which if you would reduce to //^/Wp/M^^J^/^, you are to 
remember, ihzt the Umverfal toife is to the Farijian, as 881 to 
864: Whence one Degree is equal to 55959 Toifes //^/Wy^iZ^-^, 
The Redudion of which to the meafures of other Countries is 
this ; partSo 
Suppofe the Faris foot to confift of 1 440. 
The Rhynhnd (or Ley den) foot, contains of thefe 1390. 
1\\thondon'{oQt - 1350. 
The B(?^;^/^;?-fooc r686. 
The Braccia of JF/i^^me . 25S0- 
Hence a Difg;^^ in a grand Circle of the Earth, according to 
the Meafures of different Countries, is, 
toyfes du Chafielet de Paris 57060, 
Fds de Bologna 5848 
Verges du Rhin de i2 fieds chacune 29556. 
Lieh'es Parijtemes de 2000 Toifes chacune 28 * . 
Lieues moyennes de France d' environ 2 2 S 2 1oi[es 2 5 . 
hieu'es de murine^ de 28^^ Toifes 20. 
Mito^'Angleterre, de 5000 fieds ehdcme 73-] . 
MiUes de Florence, de ^000 ha fes 6 ^ 
Nn Hence 
