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dog. [Eng.] To back and fill, to manage the sails of a ship so that the wind strikes them alternately in front and behind, in order to keep the ship in the middle of a river or channel while the current or tide carries the vessel against the wind. Hence: (Fig.) To take opposite positions alternately; to assert and deny…

pl. The whole parapet, consisting of alternate solids and open spaces. At first purely a military feature, afterwards copied on a smaller scale with decorative features, as for churches.

An instrument, utensil, or machine, which, by alternate expansion and contraction, or by rise and fall of the top, draws in air through a valve and expels it through a tube for various purposes, as blowing fires, ventilating mines, or filling the pipes of an organ with wind. Bellows camera, in photography, a form of ca…

A chain in which the alternate links are broad blocks connected by thin side links pivoted to the ends of the blocks, used with sprocket wheels to transmit power, as in a bicycle.

ed stretchers; Flemish bond (Fig.2), where each course consists of headers and stretchers alternately, so laid as always to break joints; Cross bond, which differs from the English by the change of the second stretcher line so that its joints come in the middle of the first, and the same position of stretchers comes ba…

An ancient mode of writing, in alternate directions, one line from left to right, and the next from right to left (as fields are plowed), as in early Greek and Hittite.

A projecting part of a wheel or other moving piece so shaped as to give alternate or variable motion to another piece against which its acts.

ions are attended with the formation of an intermediate compound or compounds, so that by alternate composition and decomposition the agent is apparenty left unchanged; as, the catalysis of making ether from alcohol by means of sulphuric acid; or catalysis in the action of soluble ferments (as diastase, or ptyalin) on…

A board with sixty-four squares of alternate color, used for playing checkers or draughts.

Marked with alternate squares or checks of different color or material. Dancing in the checkered shade. Milton.

Work consisting of or showing checkers varied alternately as to colors or materials.

Anything made so as to form alternate squares lke those of a checkerboard.

The board used in the game of chess, having eight rows of alternate light and dark squares, eight in each row. See Checkerboard.

A form of monochasium in which the lateral branches arise alternately on opposite sides of the false axis; -- called also scorpioid cyme. --Cin*cin"nal (#), a.

Divided into squares of alternate tinctures in a single row; -- said of any bearing; or, in the case of a bearing having curved lines, divided into patches of alternate colors following the curve. If there are two rows it is called counter-compony.

To form or shape into wrinkles or folds, or alternate ridges and grooves, as by drawing, contraction, pressure, bending, or otherwise; to wrinkle; to purse up; as, to corrugate plates of iron; to corrugate the forehead. Corrugated iron, sheet iron bent into a series of alternate ridges and grooves in parallel lines, gi…

The act corrugating; contraction into wrinkles or alternate ridges and grooves.

hen divided fesswise, so that each vertical piece is cut into two, having the colors used alternately or counterchanged. Thus the escutcheon in the illustration may also be blazoned paly of six per fess counterchanged argent and azure.

A racing stroke, in which the swimmer, lying flat on the water with face submerged, takes alternate overhand arm strokes while moving his legs up and down alternately from the knee.

ractices dancing. The merry dancers, beams of the northern lights when they rise and fall alternately without any considerable change of length. See Aurora borealis, under Aurora.