...diametral plane or base, by a perpendicular let fall on it, so that the representation of the hemisphere thus mapped on its base, is such as it would actually...placed at an infinite distance from it. It is obvious, from the annexed figure, that in this pro- jection only the central portions are represented of their...

...diametral plane or base, by a perpendicular let fall on it, so that the representation of the hemisphere thus mapped on its base, is such as it would actually...placed at an infinite distance from it. It is obvious, from the annexed figure, that in this projection only the central portions are represented of their...

...dimensions. Descriptions of various projections will be found in the works of Puissant, Francceur, and other authors on the subject; and some very useful...projection, though very good for small portions of the glohe, is of little service for large ones. "The stereographic projection is in a great measure free...

...perpendicular let fall on it, so that the representation of the hemisphere thus mapped on its base, is such as would actually appear to an eye placed at an infinite distance from it. It is obvious, from the annexed figure, that in this projection only the central portions are represented of their...

...by a perpendicular let fall on it, so that ' the representation thus mapped on its base, is such as would ' actually appear to an eye placed at an infinite distance from it.' In this kind of projection the extremities will be crowded together and distorted, therefore it can...