GRACE n.
ledge of God, or favor with God, as the preaching of the gospel, etc. -- To do grace, to reflect credit upon. Content to do the profession some grace. Shak. -- To say grace, to render thanks before or after a meal. -- With a good grace, in a fit and proper manner grace fully; graciously. -- With a bad grace, in a fo…
GREGORIAN a.
e ancient Greek scales, as Dorian, Lydian, etc. -- Gregorian telescope (Opt.), a form of reflecting telescope, named from Prof. James Gregory, of Edinburgh, who perfected it in 1663. A small concave mirror in the axis of this telescope, having its focus coincident with that of the large reflector, transmits the light…
HORIZON n.
ficial horizon, a level mirror, as the surface of mercury in a shallow vessel, or a plane reflector adjusted to the true level artificially; -- used chiefly with the sextant for observing the double altitude of a celestial body. -- Celestial horizon. (Astron.) See def. 2, above. -- Dip of the horizon (Astron.), the v…
IMAGE n.
mirror, by rays of light from the several points of the object symmetrically refracted or reflected to corresponding points in such focus; this may be received on a screen, a photographic plate, or the retina of the eye, and viewed directly by the eye, or with an eyeglass, as in the telescope and microscope; the likene…