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working together lie in different planes, and have their teeth cut at right angles to the surfaces of two cones whose apices coincide with the point where the axes of the wheels would meet.

A decoration of a flat surface, as of a band or belt, representing circular disks lapping one upon another.

Having the opposite surfaces alike.

That portion of a group of moldings which projects beyond the general surface of a panel; a bolection.

A flat surface, as of a panel or of a fence, on which bills are posted; a bulletin board.

An aëroplane with two main supporting surfaces one above the other.

ohedrons. It is somewhat harder than lead, and rather brittle; masses show broad cleavage surfaces when broken across. It melts at 507º Fahr., being easily fused in the flame of a candle. It is found in a native state, and as a constituent of some minerals. Specific gravity 9.8. Atomic weight 207.5. Symbol Bi.…

generally used by introducing it beneath the part to be divided, and cutting towards the surface.

h. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyster. See Mollusca.

A broad board painted black, or any black surface on which writing, drawing, or the working of mathematical problems can be done with chalk or crayons. It is much used in schools.

To whiten, as the surface of meat, by plunging into boiling water and afterwards into cold, so as to harden the surface and retain the juices.

separation of the film or skin, as on plants; or by the swelling of the substance at the surface, as on steel.

To make turgid, as with water or air; to cause a swelling of the surface of, from effusion of serum in the cellular tissue, producing a morbid enlargement, often accompanied with softness.

in China and Japan) from engraved boards by means of a sheet of paper laid on the linked surface and rubbed with a brush. S. W. Williams. (b) A method of printing cotton cloth and paper hangings with colors, by pressing them upon an engraved surface coated with coloring matter. -- Block system on railways, a system b…

The clouded appearance which varnish sometimes takes upon the surface of a picture.

hin wood or other material used for some special purpose, as, a molding board; a board or surface painted or arranged for a game; as, a chessboard; a backgammon board.

alcined. -- Bologna vial, a vial of unannealed glass which will fly into pieces when its surface is scratched by a hard body, as by dropping into it a fragment of flint; whereas a bullet may be dropped into it without injury.

A method of leveling a line or surface by sighting along the tops of two or more straight edges, or a range of properly spaced poles. See 3d Bone, v. t.

The act or process of daubing a vessel's bottom near the surface of the water with a mixture of tallow, sulphur, and resin, as a temporary protection against worms, after the slime, shells, etc., have been scraped off.

e copper ore (or erubescite), in allusion to the colors shown upon the slightly tarnished surface.