Meajurement of a Bcife on. Hounriow-Heath. 415 



order; two fuch pipes to be provided, about fix feet in length 

 each, and one foot in diameter, with a bore of four inches in 

 the uppermofl: end, for the depth .of two feet, and crofs-arms 

 near the lowermofl: end, in the ftile of the' common warping 

 polls. As an improvement on this idea, Mr. MyLne vexy 

 judicioufly propofed that, inftead of. the crofs-arms, the lower 

 ends' of the pipes (liould pafs through the nave of an old 

 coach-wheel, and then be fecured by a bolt underneath. This 

 alteration was approved of ; and the n,iachines, thus executed'^' 

 wereifent foon- after by water to Flampton. 



The plan and fedion of ' one of thefe w^heeis, with' thb 

 difhed fide downwards, are reprefented tovvards the left-hand': 

 in tab. XVIII. where it will be perceived, that by means of 

 four knee-pieces, made of crooked oak, the pipe is firmly 

 bolted to the wheel, and thereby kept at right-angles to its 

 plane/ The top. of. the pipe is .alfo fecured exteriorly by an 

 iron hoop, and has a caft-iron box "driven into it, whofe inner 

 diameter is four inches, anfwering to .that of the bore. . Four 

 oak' piles for eacl;i, .wheel were preparec( to be driven into the 

 bottoms of the pits dug for their reception, wlncjx ^^^ei^e fix feet" 

 in diameter, and the fame in depth. The foil n'e^r Hamptoii'' 

 Poor-houfe being of a loofe fandy nature,, there" the'pile^ were 

 eafily driven jnto the bottom, until- their top3,were on the fame 

 level. The flat of the fellies. of the wheel beincr then'laid bii'" 

 the piles, the earth was filled in and wejl. rammed around the^ 

 pipe, quite up to the furface, with wdilch its mouth is even* 

 Butthe foil at King's Arbour, being a hardr bound gravel,, the 

 piles could not be driven into the bottom of that pit ; where- 

 fore, the flat of the wheel refls there on the, gravel only. ' 



The brafs cup, formerly defcribed, was ffoni fh.e 'firfl: in- 

 tended to be placed in the pipes, for which purpole it h^s two 



Vol, LXXV. lii ' lids; 



