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

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