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about feven feet in length, around which are fixed cutting 

 wheels of cart-iron, that each turn independently of the 

 others around the common cylinder, weighing from a ton 

 to a tun and a half, being drawn by four horfes, and is 

 heavy work. It is obferved, that the cutting wheels, being 

 moveable, may be fixed by wafhers at any dillance, com- 

 monly at four inches. By palling over a frelh ploughed 

 layer, the foil is cut into little channels, four inches afun- 

 der ; the feed is then fown broad-call, and the land bufh- 

 harrowed in the direction of the drills : thus the feed is de- 

 poiited at an equal depth. George, earl of Orford, gave 

 the writer one, but the foil was too heavy for it : for 

 breaking clods in a dry feafon, no tool he ever beheld comes 

 near to it. It is fuppofed by fome, that the main object of 

 the practice is to fave the trouble and expence of dibbling, 

 though it is not near lo good a practice. 



And it is remarked by the author of the above Agricul- 

 tural Report, that they arc much in ufe in Lodden hundred. 

 Mr. Burton, of Langley, puts in a great deal of corn thus, 

 and approves the method fo much, that hitherto he has 

 drilled little ; but thinks dibbling a '.alt improvement. It 

 is, however, added, that the implement was more com- 

 monly ufed in the county ten or twelve years ago than it is 

 at prefent ; for the drill machine has been adopted by many, 

 who formerly had a good opinion of this tool. It mult, 

 however, be found beneficial in its original intention, in 

 many cafes, on the very light friable foils ; and as a pul- 

 verizing machine on thofe of the heavy kind, when ufed in 

 fuitable feafons. 



Roller, Furrow. This is a tool of the roller kind, 

 contrived for the purpofe of rolling the furrows in fteep 

 hilly iituations, and other places where the common tort 

 cannot be employed. It is the invention of Mr. Pinchard, 

 and is an ufeful contrivance for the purpofe for which it was 

 intended. 



Roller, Grafs. This is a heavy fort of roller, made 

 ufe of for the purpofe of rendering the furface of grals-lands 

 fmooth and even. It has been fuggelled, that the wooden 

 rollers of this fort, which are frequently employed with 

 great propriety on grafs and palture lands, are in many 

 cafes made too large to produce that powerful effect which 

 is wanted, without the aid of additional weight being given, 

 If made lefs, and well loaded, it is fuppofed that a greater 

 degree of preflure will be afforded. A medium Gze is pro- 

 bably the mofl effectual in giving the requifite preflure i:i 

 fuch cafes. A powerful implement of this lort, which is 

 ufed in the beft grafs dillrift of the kingdom, weighs fome- 

 thing lefs than half a ton. It is, however, made of wood ; 

 but iron or flonc, where they can be had, are much better 

 materials. It is Rated in the Norfolk Agricultural Report, 

 that Mr. Coke has the molt powcrhil roller for grafs-land 

 that the writer has feen : it was call at the Carron Foundery. 

 It is five feet fix inches high, and five feet iix inches long ; 

 weighs three and a half tons ; is drawn by four horfes, 

 and coft fixty pounds. It is obferved, that it leaves the 

 furface of grafs-lands in the order that it ought always to 

 be in. 



Roller, Jointed, fuch a one as is made with a joint or 

 joints, in order to conform to the nature of the ridges. 

 Thefe kinds of rollers are conftructcd by fome farmers in 

 the county of Effex. Mr. Tweed has invented one, which 

 he finds of very great ufe. He rolls all his clover land for 

 drilling wheat with it, and employs it for whatever fort of 

 tillage-rolling is to be performed. The great object of it is 

 to prevent the horfes from poaching, by their going only 

 in the furrow, two of them at length. 



Roller, Spike. This fort of roller is condru&cd much 



HOL 



in the fame way as thofe of the common kind, only inflead 

 of being plain, it is ftudded or fet with a considerable num- 

 ber of fpikes, by which it is fuppofed to break the foil more 

 effectually. It is moftly employed on the heavy, itiff, 

 lumpy tillage lands, for the purpofe of reducing and bring- 

 ing thefe into a better itate of pulverization. In fome cafes 

 it may be a good implement : it may be connected with the 

 compound roller. When the drill-roller is in ufe, this fort 

 of roller is unneceffary. 



Roller, in Gardening, a very ufeful implement in many 

 different intentions, and for feveral different purpofes. The 

 kinds which are moll commonly employed in this way are 

 thofe of ftone and calt-iron, for compreffing the more hard' 

 furfaces ; and thofe of the fmaller wood fort, for removing 

 worm-calls and other protuberances on fhort grafs-lawns, 

 and other defcriptions of pleafure-grounds, in the ftate of 

 turf or fward. They are never required to be of any great 

 weight for thefe ufes, but to be capable of being readily 

 managed by the labourer without difficulty or incon- 

 venience. 



No unufual peculiarity of form is here ever neceflary, as 

 the mam object is conltantly that of rendering the furfaces, 

 over which they may pafs, as fmooth and even as pof- 

 fible. 



Moderate or middle-fized common calt-iron rollers are 

 now molt ufually made ufe of, for the purpofes of gar- 

 dening. 



Roller, in Inland Navigation, a term applied to an in- 

 clined plane, with rollers on it. 



Roller, in Ornithology, the common name of a bird of 

 the mag-pie kind, called garrulus argentoratenfis by authors, 

 and fufpedted to be the fame with the bird defcribed by 

 Gefner, under the name of the blue cr'fw, comix csruha, 

 and by Aldrovand under the name of pica marina. It is the 

 CoRACIAS Garrula of Limixus ; which fee. 



Roller is alfo the name by which fome call the ampelis, 

 or garrulus Bohcmicus. This, in the Linnaean fyftem, is a 

 fpeeies of the ampelis. See Gahki i i s. 



Roller, in Block-making, a cylindrical pin turning on 

 its cwn axis, which is ufed in fome blocks, iultead of a 

 fheavc. 



Rollers, Cylindrical, pieces of timber, revolving on an 

 iron axis, and fo fixed above the deck, either perpendicularly 

 or horizontally, as to prevent the chafing of the meffenger 

 or cable againlt the jeer and topfail-fheet bitts, &c. Thofe 

 fixed forward in the manger are to facilitate the meffenger to 

 the capltan. 



Rollers Fridion, are made of two parallel circular plate» 

 of brafs, about a quarter of an inch thick. Four or more 

 folid brafs cylinders are placed at equal dillance-, round thefe 

 plates, and work upon their own axe:., between them, at 

 right angles. Thus any pin working through thefe pines 



of brafs mull touch the rolling Unlaces ol the folid brafs 

 cylinders, by which the friction is confiderably lefTened. 



Roller, in Surgery, a long and broad ligature, ufually 

 ol linen cloth, ufed for binding, furrounding, and contain- 

 ing, the parts of the hum; n body, and keeping them in, or 

 difpofing them, to a Hate of health. 



A roller corifilts of two rait : the / >dy, and the two ex- 

 tremities, which fome call b • h or chiefs, and others tails. 

 Thera are ided rollers, that is, fuch as are rolled at 



one head only, double-headed rollers, ,',,. 



Again: foi [ually rolled and gathered together ; 



as thofe applied to fractures and difli .- '■ d joints. Other-. 

 are cut into feveral cl tor the head, 



chin, &c. Others are compofed ol feveral fwatbs, gathered 

 and Ititched together ; as thofe for tin- telliclcs, &c. Some 



again 



