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A device for giving shifting effects of color to a photograph. The unmounted print, made translucent, is illuminated from behind with colored light.

ne span, called the pivot span, turns about a central vertical axis. -- Pivot gun, a gun mounted on a pivot or revolving carriage, so as to turn in any direction. -- Pivot tooth (Dentistry), an artificial crown attached to the root of a natural tooth by a pin or peg.

the head to pass through. A kind of poncho made of rubber or painted cloth is used by the mounted troops in the United States service.

That which is raised by pumps, or the work done by pumps. The pumpage last year amounted to . . . gallons. Sci. Amer.

oblong box on runners. [U.S.] Sledges or pungs, coarsely framed of split saplings, and surmounted with a large crockery crate. Judd. They did not take out the pungs to-day. E. E. Hale.

An instrument for measuring altitudes, variously constructed and mounted for different specific uses in astronomy, surveying, gunnery, etc., consisting commonly of a graduated arc of 90º, with an index or vernier, and either plain or telescopic sights, and usually having a plumb line or spirit level for fixing the vert…

A hostile or predatory incursion; an inroad or incursion of mounted men; a sudden and rapid invasion by a cavalry force; a foray. Marauding chief! his sole delight. The moonlight raid, the morning fight. Sir W. Scott. There are permanent conquests, temporary occupation, and occasional raids. H. Spenser.…

One of a body of mounted troops, formerly armed with short muskets, who range over the country, and often fight on foot.

expended, paid out, sent away, and the like; -- usually in the plural; as, the receipts amounted to a thousand dollars. Cross receipts. See under Gross, a.

me (Pros.), the meter of five accents, with couplet rhyme; -- probably so called from the mounted pilgrims described in the Canterbury Tales. Dr. Guest. -- Riding school, a school or place where the art of riding is taught.

Any implement or machine working with a rocking motion, as a trough mounted on rockers for separating gold dust from gravel, etc., by agitation in water.

A chair mounted on rockers, in which one may rock.

The figure of a horse, mounted upon rockers, for children to ride.

of such a roof when used in places where a different form is more common; as, a tower surmounted by a saddle roof. Called also saddleback roof. -- Saddle shell (Zoöl.), any thin plicated bivalve shaell of the genera Placuna and Anomia; -- so called from its shape. Called also saddle oyster.

ed room, usually called scioptic ball. Scioptic ball (Opt.), the lens of a camera obscura mounted in a wooden ball which fits a socket in a window shutter so as to be readily turned, like the eye, to different parts of the landscape.

A saddle for women, in which the rider sits with both feet on one side of the animal mounted. Sidesaddle flower (Bot.), a plant with hollow leaves and curiously shaped flowers; -- called also huntsman's cup. See Sarracenia.

A temporary fort or parallel where siege guns are mounted.

In India, a mounted soldier.

A small instrument containing a minute particle of a radium compound mounted in front of a fluorescent screen and viewed with magnifying lenses. The tiny flashes produced by the continual bombardment of the screen by the a rays are thus rendered visible. -- Spin*thar`i*scop"ic (#), a.

A horizontal graduated bar mounted on a staff, used as a stadium, or telemeter, for measuring distances.