Category:Oroheliograph

Or`o*he"li*o*graph, n. [gr. mountain + helio- + -graph.] (photog.)

Defn: a camera for obtaining a circular panoramic view of the Horizon. The photographic plate is placed horizontally with a Vertical lens above. A mirror of peculiar shape reflects light from The entire horizon to the lens, by means of which it is focused upon The plate.