The projection of the sphere, orthographic, stereographic and gnomonical. Both demonstrating the principles, and explaining the practice of these three several sorts of projection.
Emerson, William,1701-1782.
London : printed by J. Bettenham for W. Innys,
1749.
The preface signed: W. E., i.e. William Emerson.
ESTC
Also reproduced on microfilm. Woodbridge, CT: Research Publications, Inc., 1983. The Eighteenth Century ; reel 337, no. 10.