p2 ! 09 ) 
out undergoing any other Aiteratjon, and then it 
will become a Portion of aSe&or of. a Circle ; which 
Portion will have for its Length, or middle Line, an 
Arch of a Circle defcribed with the afQrefaid Tan- 
gent, as a Radius, whole Length will be the feme 
as the Parallel of Contact, aud its Breadth will be 
equal to an Arch of the. Equator of ten Degrees, as 
before. This Segment of a Sedor of a Circle fb 
produced, may therefore be eafily defcribed in plano> 
and within it may be inferred all the Places belong- 
ing to it, according to their Longitude and Lati- 
tude. Then it muft be applied to the Globe, foas 
that its middle Line lhall coincide with the Parallel 
of ten Degrees ; then by prefling it may be bent 
to the Surface of the Globe, every Meridian to its 
refpedive Reprefentative, by which it will uniform- 
ly contrad a little according to Longitude, but not 
at all according to Latitude. And thus the Globe 
will be cover’d as far as 15* Degrees of Latitude. 
The next Zone, or that belonging to the Parallel 
of 10 Degrees, may be thus conftruded a priori . 
Upon a plain Paper, with Radiusequal to the Tan- 
gent of 70 Degrees, defcribe an Arch, whole Length 
is equal to that of the Parallel of 20 Degrees ; as 
alfo two other concentrick Arches on each Side, 
at a Diftance from the middle Arch equal to A an 
Arch of five Degrees. This will be the required 
Segment of the circular Sedor, in which are to 
be inferted all the Places belonging to it, accord- 
ing to their Longitude and Latitude. Then the 
middle Line or Arch is to be apply’d to the Parallel 
of ao Degrees upon the Globe, and the Segment of 
the conical Surface thence arifing is to be duly con- 
traded 
