JMijcellanea Curio [a* 1 3 



23. And the divifion of Meridians, repre 

 fented by the furface of a Cylinder ere&ed (on 

 the Arch of Latitude) at right Angles, to the 

 Plain of the Meridian (or a portion thereof.) 

 The Altitude of fuch Proje&ion, (or portion of 

 fuch Cylindrick furface) being (at each point 

 of fuch Circular bafe) equal to the fecant (of 

 Latitude) anfwering to fuch point. As Fig. 5. 

 . 24. This Projection (or portion of the Cy- 

 iindrick furface) if expanded into a Plain, will 

 be the lame with a Plain Figure, whofe bafe is 

 equal to a Quadrantal Arch extended (or a 

 portion thereof) on which (as ordinates) are 

 erected Perpendiculars equal to the Secants, 

 anfwering to the refpedtive points of the Arch 

 fo- extended : The leaft of which (anfwer- 

 ing to the Equinottial) is equal to the Radius^ 

 and the reft continually increafing, till (at the 

 Pole) it be infinite. As at Fig. 6, 



25. So that, as E Rf L. (a Figure of Secants 

 ere&edat right Angles on EL, the Arch of 

 Latitude extended,) to E R R L 7 (a re&angle 

 on the fame bafe, who's altitude ER is equal 

 to the Radius*,) fo is E L (an Arch of the E- 



Suator equal to that of Latitude,) to the di- 

 :ance of fuch Parallel, (in the Chart) from the 

 Equator. 



26. For finding this diftance, anfwering to 

 each degree and Minute of Latitude*, Mr. 

 Wright (as the raoft obvious way) adds all the 

 Secants (as they are found calculated in the 

 Trigonometrical Canon) from the beginning, 

 to the degree or Minute of Latitude propo- 

 fed. 



27. The fum of all which, except the Great- 

 eft, (anfwering to the Figure Infcribed) is too 

 Little ; The fum of all except the Leaft, (an- 

 fwering 



