An Explanation of the Gnomonic Projection of the Sphere

An explanation of the gnomonic projection of the sphere and of such points of astronomy as are most necessary in the use of astronomical maps. Being a description of the construction and use of the larger and smaller maps of the stars. This book, "An explanation of the gnomonic projection of the sphere", by Augustus de Morgan, is a replication of a book originally published before 1836. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.