144 A Jljort Account of the Imprsi'emcfit 



much fliorter than the iaft, whatever that may be, as the 

 thickncfs intended for the wall : they are, in faft, wedge- 

 formed. This is {o prcciioly the cafe, that wliere the pieces 

 (to which the patentees have given the mn\t oi Taihani' s 

 clumps) are intended to form folid pillars, or the like, they 

 exhibit only the three firft-nientioned vertical fides. 



The horizontal, or under and upper fides of the clumps, 

 have a kind of fliouldering or protruding part, and a corrc- 

 fponding hollow or deprefled part to fit the fin)ilar parts of 

 the next courfc, and thefe are at the fame time fo adjufled 

 that each courfe will break joint with the one before laid ; 

 that is, the vertical joinings of every row fall on the middle 

 of the clumps which form the one below and the one above it. 



The form given to the Ihoulderings or joggelings is fo in- 

 goiiioufly contrived, that, were a cylinder lormed of thefe 

 clumps, with the two extreme circles tied together by means 

 of long bolts pafling up the centre, fecured by fcrovvs or other 

 fadenings, it might be laid upon its fide and employed as a 

 garden roller, without the poflibility of any one of the clumps 

 falling out of its place. 



It is eafy to fee that this contrivance is applicable to a va- 

 riety of purpofes : as, 



ill, In rural archite£lure, 8:c. For example, in cottages, 

 country hoiifes, villas, circular barns; granaries, fecure from 

 rats, mice, and other vermin ; feeding houfes, cattle Iheds, 

 fununer houfes, caftles, towers, turrets, battlements, pali- 

 fadoe work, door fteps, ftair-cafes (fecure from fire), plea- 

 fure houfes on eminences and near the fea, bathing houfes, 

 &c. 



ndlv, In folid work ; as colunms, colonnades, agricultural 

 rollers, rollers for roads, garden rollers, Hone or brick piers 

 in water works, 8cc. 



^dly, To hydraulic and fubtcrraneons architecture, for 

 fewers, culverts, tunnels, conduits; cylinders in bridge 

 work, thereby giving Itrength, cheapncfs, waterway, and 

 jiehtnefs, to the ftrudure ; mills, refervoirs, communica- 

 tions, wells, cefspools, and the like. 



4ihly, In marine architedure, to dock work, bafins, har- 

 hours, piers, jetties, iight-houfes. 



^ihly. In military architcclure, to magazines, block- 

 hoiiics, redoubts, covert ways, lines of connnunication, 

 watch towers, &c. 



6thly, In architeflure applying to warehoufes and manu- 

 fa6\ures; for example, circular windows and other apertures 

 admittinn- light and air, brewers' vaults, boilers, &c. &c. 



jthly^'^Church architediure j for example, circular cha- 

 pels, 



