Perspector
By: by T.A. De Postels
Publisher: Reinhold
Published: 1952
Place of publication: New York
Language: eng
Subjects: Perspective
Notes: "The Perspector is ... two separate devices on one plate: 1. A special protractor to establish the visual distance for a perspective view in accordance with an angle of vision. 2. Perspectographic means for actually developing a perspective from plan and elevation drawings."