DOI Page / Citation link:
https://doi.org/10.11588/diglit.1456#0331
284
The Fourth Part. Chap. II.
well at firft This Work, befides that it, requires a great
deal of Care, and experienc'd Workmen, demands alio
good Materials to be uled in ity as mall be explained
hereafter.
* But before I proceed to fliew you how Bafbns are made,
it will be necefiary to diitinguyh the feveral Kinds that are
in Ufe. Of thefe there are three Sorts; Balbnsthat are made
with Gay, with Cement or Mortar, and with Lead.
I Shall begin with Balbns of Clay, as thole that are moft
inUle.
The Place being traced out upon the Ground, you muft,
before you caufe it to be dug, extend and enlarge the Out-
line of it four Foot farther, that is to lay, make the Diame-
ter four Foot bigger on each Side, which makes eight Foot
in all. The Balbn will be never the bigger for this, becaule
the Addition of four Foot will be filled up and poffefled by
the Walls and Clay-work of the Circumference. You Ihould
alio obferve, for the Bottom of the Balbn, to hollow the
Ground out two Foot lower than the Depth you defign to
give it. The two Foot thus dug out, will be likewife filled
some Toun- by. the Bed of Clay, which ought to be 18 Inches thick j
taih>Tbut'fif- anc*t^ie other ^x Inc^esaref°r £^eGravelanc* Paving which
teen inches is laid upon the Clay. For Example j if you would make
ciaklfm- a Bafon of fix Fathom Diameter, the Ground Ihould be
tom, though open'd ieven Fathom and two Foot; and if you would
th-2 ST- IK ^ve tvvo ^oot ^P^1 °^ Water, it Ihould be dug out four
they do tofrve Foot. So the Bafon, when finiln'd, will always come to the
jome of the Size and Depth required, of fix Fathom Diameter, and two
Y/^Z Foot Cavity.
she Bottom of The Ground Ihould be dug perpendicularly, and be car-
^^^^riedaway, as was taught above in the fecond Chapter of the
Hp. fecond Part. The Digging being finilhed, and the Earth
-cleared out, you muft build two Walls, and inclofe the Clay
betwixt them, that by this means the Water may not dilute
.it, that it may keep cool, and that the Roots of the neigh-
jbouring Trees may not fo eafily penetrate it.
Against the Earth raife or back up the Wall A, Fig. 1.
following, of one Foot thick, from the Bottom of the Dig-
ging, to the Level of the Ground above, which you may build
•jyith Shards, Rubble, or Flints, no matter which; with, Mor-
tar
The Fourth Part. Chap. II.
well at firft This Work, befides that it, requires a great
deal of Care, and experienc'd Workmen, demands alio
good Materials to be uled in ity as mall be explained
hereafter.
* But before I proceed to fliew you how Bafbns are made,
it will be necefiary to diitinguyh the feveral Kinds that are
in Ufe. Of thefe there are three Sorts; Balbnsthat are made
with Gay, with Cement or Mortar, and with Lead.
I Shall begin with Balbns of Clay, as thole that are moft
inUle.
The Place being traced out upon the Ground, you muft,
before you caufe it to be dug, extend and enlarge the Out-
line of it four Foot farther, that is to lay, make the Diame-
ter four Foot bigger on each Side, which makes eight Foot
in all. The Balbn will be never the bigger for this, becaule
the Addition of four Foot will be filled up and poffefled by
the Walls and Clay-work of the Circumference. You Ihould
alio obferve, for the Bottom of the Balbn, to hollow the
Ground out two Foot lower than the Depth you defign to
give it. The two Foot thus dug out, will be likewife filled
some Toun- by. the Bed of Clay, which ought to be 18 Inches thick j
taih>Tbut'fif- anc*t^ie other ^x Inc^esaref°r £^eGravelanc* Paving which
teen inches is laid upon the Clay. For Example j if you would make
ciaklfm- a Bafon of fix Fathom Diameter, the Ground Ihould be
tom, though open'd ieven Fathom and two Foot; and if you would
th-2 ST- IK ^ve tvvo ^oot ^P^1 °^ Water, it Ihould be dug out four
they do tofrve Foot. So the Bafon, when finiln'd, will always come to the
jome of the Size and Depth required, of fix Fathom Diameter, and two
Y/^Z Foot Cavity.
she Bottom of The Ground Ihould be dug perpendicularly, and be car-
^^^^riedaway, as was taught above in the fecond Chapter of the
Hp. fecond Part. The Digging being finilhed, and the Earth
-cleared out, you muft build two Walls, and inclofe the Clay
betwixt them, that by this means the Water may not dilute
.it, that it may keep cool, and that the Roots of the neigh-
jbouring Trees may not fo eafily penetrate it.
Against the Earth raife or back up the Wall A, Fig. 1.
following, of one Foot thick, from the Bottom of the Dig-
ging, to the Level of the Ground above, which you may build
•jyith Shards, Rubble, or Flints, no matter which; with, Mor-
tar