THEORY OF POLYCOXIC PROJECTIONS. 



Values of c. 



167 



Values of d. 



Values of K. 



TRANSVERSE POLYCONIC PROJECTION. 



If the earth is considered as a sphere, there is no reason 

 why the tangent cones that determine the projection 

 should necessarily be tangent to the earth along parallels 

 of latitude and should have their apexes in the axis of the 

 earth. Any diameter prolonged might just as well serve 

 as the line of apexes, and then the cones would be tangent 



