B A 



PrefTure of the Ground about it. 

 The inward Wall ought to be made 

 with good Rubble-ftones, that will 

 not fcale and come off in Flafhes in 

 the Water i or elfe of Flints and 

 Stones from the Hills, which will 

 make durable Work, but will not 

 look fo neat as the pointed Rubble j 

 and there ought to be laid here and 

 there Stones, the Thicknefs of the 

 Wall, to render it the more fub- 

 ftantial. 



The Method of making Bufons 

 of Cement is as follows : After you 

 have mark'd out the Dimenfions 

 of the Bdfon as before, if you in- 

 large it one Foot nine Inches, it 

 will be fufficientj and the fame 

 Depth deeper at the Bottom will 

 be enough. 



This being done, you mufi: be- 

 gin to back up and raife againft the 

 Ground j cut perpendicularly a Wall 

 of Mafonry a Foot thick, which 

 mull goto the Bottom, and fhould be 

 built with Sliards and Rubble-ftones 

 laid in Mortar of Lime and Sand. 



When the Wall is finilh'd round 

 the Circumference, then the Bot- 

 tom is to be wrought a Foot thick 

 with the fame Materials i and then 

 the folid Work or Lining of Ce- 

 ment is to be back'd up againft the 

 Walls nine Inches thick, include- 

 ing the Plaiftering and inward Sur- 

 face. 



This Solid ought to be made of 

 fmall Flints, laid in Beds of Mor- 

 tar made ot: Lime and Cement, 



When this Solid is eight Inches 

 thick, it ought to be plaifter'd over 

 the whole Surface of the Bottom 

 with Cement well fifted before it 

 be temper'd v/ith Lime j and with 

 this it fhould be wrought over 

 fmooth w th the Trowel. 



The Proportion of this Cement, 

 (hould be two Thirds of Cement, or 

 powder'dTiie, to one Third of Lime. 



B A 



The Cement has the Property to 

 harden fo under Water, that it will 

 be as hard as Stone or Marble, and 

 the Body will be fo folid as never 

 to decay. 



After the finifhing of the Bafon, 

 the Plaiftering ftiould be for four or 

 five Days fucceflively anointed over 

 with Oil or Bullock's Blood, to 

 prevent it from cracking or flaw- 

 ing j this being done, the Water 

 fhould be let into the Bafon as foon 

 as may be. 



Tho£Q Bafons which are made of 

 Lead, are to be thus wrought : The 

 Out-lines ought to be inlarg'd one 

 Foot of a Side, and digg'd half a 

 Foot deeper than the Bafon is to 

 be. 



The fide Wall muft be made a 

 Foot thick, that it may be able to 

 bear up againft the E^rth lying a- 

 gainft it j but the Bottom will not 

 require to be more then half a Foot 

 thick. 



Thefe Walls muft be built with 

 Bjiibble laid in Mortar all of Plaifter, 

 becaufe the Lime will eat the Lead j 

 and then the Lead muft be laid on 

 the Walls and Bottom, and be 

 feam'd with Solder. 



But Ba,fons of Lead are not much 

 in Ufe, becaufe of their great Charge 

 in making, and the Danger of the 

 Lead being ftolen. 



Great care ought to be taken to 

 keep the upper Edge and Super- 

 ficies of a Bafon upon a Level, that 

 the Water may cover all the Walls 

 equally. 



As for the wafte Pipes of Bafons, 

 whether at the Bottom or Super- 

 ficies, they ought not to be made 

 too fmall, left they fliould be choak'd, 

 notwithftanding the Cauls that arc 

 drawn before them. 



When this wafte Water is only 

 to be loft in Sinks and common 

 Scwer^, it is carry'd away in Drains 



or 



