rolling (roling)

[ with the speed with which the ve el pa es through the tackle. water. If the ve el were traveling upon land upon wheels of the size of this circle and with the same speed of engine, her velocity would remain unaffected. - Rolling colter. See colter. - Rolling curve, a roulette. - Roll Rolling globe, a large ball on which acrobats stand ing fire. See fire, 13. - Rolling friction. See friction, and ascend inclined planes. - Rolling hitch, a hitch made with the end of one rope round another rope under tension, or round a spar, in such a way that when drawn on in the direction of the length of the rope or spar the hitch will jam.- Rolling pendulum, a pendulum carrying cylindrical bearings which roll upon a plane or other surface. A special case of a rolling pendulum is a cylinder loaded at one side; another and extreme case is a pendulum turning on knife-edges. Rolling-pre ure pre . See pre 1. Rolling purchase, an arrangement of pulleys with one or more movable blocks: a phrase having application especially to the mechanical appliance used for bending the great arbalist of the fourteenth and fifteenth centuries. It was an apparatus which could be applied to the stock when required, and then detached and carried in the belt. See cut under moulinet. - Rolling reef, a method of shortening sail by rolling the canvas about a roller underneath the yard, thereby doing away with the use of reef-points. - Rolling resistance, that resistance to the rolling of a body over a surface which is caused by cohesion.- Rolling topsail, rolling topgallant sail, sails reduced in area by being rolled up on a roller underneath the yard. rolling-barrel (ro'ling-bar"el), n. In gunpow der- manuf. See barrel. rolling-chock (rõʻling-chok), n. Naut., a piece of wood fastened to the middle of an upper yard, with a piece cut out of its center so that it may half encircle the mast, to which it is secured by an iron or rope parrel inclosing the the yard. other half of the mast. Its purpose is to steady rolling-cleat (rõʻling-klēt), n. Same as rolling chock. rolling-dam (rõʻling-dam), n. The rough dam used in rolling for trout. See rolling, 3. rolling-frame (ro'ling-fram), n. In dyeing, anar range ment of rollers for drawing cloth through the dye-beck. Also called galloper. E. H. Knight.